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	Rotary Phase Converters Three Phase Rotary Converter
		Such 3 phase converters may also allow the frequency (see also frequency converters) to be varied allowing for different equipment frequency requirements (50Hz, 60Hz, 400Hz, etc.) and also for motor speed control (VFDs).
		Some locomotives are driven by 3-phase motors with 3 phase converters converted from the incoming supply of either DC or 1 phase AC.
		Note: In the U.S. Phase Converter Standards Organization's research they found that some companies called a product that they sold a "Rotary Phase Converter" but, in fact, their product is made with just a control box (or a Static Converter) and an electric motor.
	www.3phasepower.org /rotaryphaseconverters.htm (1751 words)

	What is a rotary converter?
		A rotary converter (click photo for enlargement), or synchronous converter, is a large, rotating electromechanical device, like a motor or a generator, formerly used to convert alternating current (AC) to direct current (DC).
		Rotary converters were gradually replaced in the mid-century by the new technology of the mercury arc rectifier, in wholly new, unmanned, totally windowless "monolith"-looking substations.
		Synchronous converters could be started and brought up to speed (synchrony) as AC induction motors (with the help of additional "starting" windings), as DC motors back-fed from siblings or the third rail, or with the aid of a smaller "auxiliary" motor attached, which latter was standard in the IRT substations.
	www.nycsubway.org /tech/power/rotary.html (1772 words)

	phaseconverter
		The rotary converter is nothing more than a second motor in the circuit which is acting as a generator.
		The rotary converter is best served when you have a motor which is started and stopped frequently, and you need the full power of the motor.
		Since the static converter will provide a motor with 80% of it's normal operating power, and the rotary phase converter uses a static phase converter as a starter, your idler motor should be 125% of your tool(s) motor size.
	home.att.net /~waterfront-woods/Articles/phaseconverter.htm (3302 words)

	Building a rotary phase converter
		If that is the case, either purchase a commercially made rotary converter, or hire an industrially experienced electrician to put the converter together for you.
		I bought my rotary converter used from a friend, and he bought it from a fellow who made it himself.
		Balancing the legs on the rotary converter is an issue, although I think not totally critical.
	www.woodweb.com /knowledge_base/Building_a_rotary_phase_converter.html (1842 words)

	Phase Converter - Phase Perfect Phase Converter - Digital Phase Converters
		Rotary and static phase converters intrinsically have the ability to absorb braking currents because two of the wires to the motor are connected directly to the supply system.
		Since a rotary converter has no control over the output voltage, each motor and each load represents a different situation and manufacturer is not able to predict how their converter will behave.
		In the example of the 7.5 HP rotary converter used in a machine shop where one of the line-line voltages from the rotary converter was at 280 V, the electronics unit of a CNC would probably be damaged if it were operated at such a high voltage.
	www.phaseperfect.com /phasewhitepaper.htm (5583 words)

	Rotary Phase Converter Information Page - Phase-A-Matic, Inc.
		The rotary portion of our converter is custom built to our specifications by Baldor Electric, one of the largest and most trusted motor manufacturers in the world, with warranty stations nationwide and worldwide.
		It is a true phase converter and not a modified electric motor as most of our competitors use.
		We continue to hear of our Rotary Converters that have been in service for 25 or 30 years, and which are still working flawlessly.
	www.phase-a-matic.com /RotaryDescription.htm (611 words)

	BCI Rotary Phase Converter. Brandon & Clark: Industrial Electric Ac/DC Equipment
		The BCI Rotary Phase Converter starts every time on a lower voltage than most motors operate on.
		The BCI Rotary Phase Converter has a compact control panel which reduces the size and weight of the unit.
		The BCI Rotary Phase Converter incorporates a magnetic starter and start-stop push buttons into the controls.
	www.brandonclark.com /htm/phase_converters.htm (230 words)

	Rotary Converters Techincal Information - The Engineers Emporium
		The Rotary Converter provides an artificial means by which a three-phase motor can be operated from a single-phase supply thereby offering a cost-effective solution to this dilemma.
		The Rotary Converter is often operated in conjunction with machine tools, however it is also suitable for applications where equipment has a heavy starting load or is subjected to an abnormal surge current.
		This style of converter is typically used in a single operator environment where only one machine is used at a time.
	www.theengineersemporium.co.uk /other-pages/rotaryinfo.html (539 words)

	PhaseMAXX rotary phase converter design
		rotary phase converters are actually single-phase machines that develop not just one, but two additional phases - each of which are progressively displaced in time-phase sequence by 120 degrees.
		A Rotary converter which is produced with a high resistance rotor, yet has no other difference from that of the standard 3-phase motor, will not be able to maintain an angular phase displacement of 120 degrees between each output phase (the same as a Utility supplied 3-phase supply).
		Again, prudent converter manufacturers design either (converters that have a unique rotor cage capable of maintaining phase angle displacement), or (converter stationary windings with unique placement or provision for the adjustment of phase angle for specific loads).
	www.electram.com /rotary_phase_converter_design.htm (518 words)

	converter phase rotary (Site not responding. Last check: 2007-10-15)
		This is a rotary phase converter (minus the idler) that I built to power my mill.
		Our digital phase converters are not just another name for a rotary converter, static converter or phase...
		The rotary part of the rotary phase converter is a standard 3 phase electric...
	rotary.33all.info /converter-phase-rotary (471 words)

	Technical Specifications For Phasemaster Rotary Three Phase Converters and Miniphase Static Three Phase Converters
		The rotary frame portion of the converter shall be cast iron or rolled steel dripproof construction.
		Rotary converters shall be built on a NEMA frame at least two sizes larger than the frame size of the load.
		All converters shall be capable of starting on half voltage without damage to windings or other components and shall be capable of operating continuously under no-load without overheating.
	kayind.com /tech_center/specifications.htm (887 words)

	Power Generation: IRT Substation 21
		At the time the photographs were taken on October 22, 1996, rotary converters #2 and #8 (1902 Manhattan Elevated Railway) were placed on-line during the morning and evening rush hours to supplement the load from the adjacent solid state substations.
		When a rotary converter is brought up to speed by the third rail, then the sychroscope and associated sychronizing lights are used to determine when rotary converter is in step or sychronized with the incoming AC power feeds.
		At that time, the rotary converter is disconnected from the third rail and the AC power feeders at connected to run the rotary converter.
	www.nycsubway.org /tech/power (463 words)

	Rotary phase converters, rotary phase conversion
		Rotary three phase converters use an internal motor-generator for single to 3 phase conversion.
		Isomatic rotary converters, with 600% overload capability and no electromechanical contacts, are ideal for farms, workshops, garages, large buildings, etc. Isomatic Phase Converters primarily supplies the UK (Great Britain and Northern Ireland), the Republic of Ireland, Spain, Canary Islands, Ballearic Islands, Hungary, Turkey, Iran and other countries in Europe and the Middle East.
		Unlike 'static' phase converters, they are not limited to driving a single motor, nor do they limit the motor's torque or have a lower limit to output power.
	www.isomatic.co.uk /rotaryconverter.htm (2388 words)

	Submarine Electrical Systems - Chapter 12
		The purpose of the constant frequency control unit is to control the speed of rotation of a rotary converter, primary 120-volt d.c., secondary 115-volt, 60-cycle, a.c., and maintain the frequency of the output at exactly 60 cycles for operation of the log and shaft revolution indicator system.
		This converter, together with the frequency control unit, supplies the constant frequency 60-cycle current necessary for the operation of the synchronous motor in the propeller shaft revolution indicators.
		When the speed of the inverted rotary converter is increased to 1800 rpm by means of field resistance, the contacts of the governor remain closed and the speed control rests with the external resistance in the constant frequency control unit.
	www.maritime.org /fleetsub/elect/chap12.htm (3794 words)

	About Phase Converters (Site not responding. Last check: 2007-10-15)
		With the static phase converter once the motor has started the converter circuitry disconnects itself and the motor continues to run on single-phase power, but because only two of three windings get power during running, power output is reduced to 2/3.
		Although the static phase converter works fine on these lathes in the slower speeds, in the higher speeds the converter is able to start the lathe turning but the lack of rated horsepower makes these higher speed settings useless.
		Rotary Phase Converters continuous full three phase power can be used to run either Wye or Delta run motors or most any other application that requires three phase power with reliability and efficiency.
	www.fortunecity.com /business/bankrupt/44/id27.htm (848 words)

	Phasemax rotary phase converter standards
		One of the problems individuals face when pricing out converters, is that many phase converter manufacturers provide confusing or conflicting information, making it quite impossible to compare one manufacturer's converter with that of a different manufacturer.
		Hence, a Rotary converter that is sized too small for a particular motor will not allow the motor to develop the required load starting torque, nor reach its rated speed.
		Since no governing body has established standards for phase converters, it is up to each phase converter manufacturer to determine if a particular FRAME will maintain adequate voltage during the motor start cycle (ensuring that the motor will be capable of starting the load).
	www.electram.com /rotary_phase_converter_standards.htm (859 words)

	Phase Converters, Rotary and Phase Converters - Three Phase Power
		With a 5 HP Rotary converter You may also run more than one motor off the same converter, as long as it is not larger than the 5 hp and run a combined total hp of all motors up to 15 hp.
		Standard converters are for equipment that does not have much of a load at start up and few starts an hour.
		Heavy duty converters are for machines that start more often and that have a bigger load on the motor, not a free wheeling situation.
	www.amer-rest-equip.com /phase-converters.html (394 words)

	Roto-Master Rotary Phase Converter
		CONVERTERS run three phase machines from 220V single phase power source.
		Balanced converters start instantly as power is generated on each phase, resulting in low inrush amperage.
		Some converters on the market use only one phase of the converter winding, resulting in longer starting time and high drops and flickering for the customers and the utility companies.
	www.roto-master.com /QA (536 words)

	RCA CHAPTER 3-223
		The rotary converter used with Photophone equipment was specially constructed for such use, as the ordinary rotary converter run from a 125 volt DC line would not supply, the voltage required by the power amplifier unit.
		A rotary converter which may be used in any installation where the 1/2 k-va. motor-generator set may be used is illustrated in Figure 30.
		In Figure 31 is illustrated the 1 1/2 k-va. rotary converter which may be used in any installation where the 1 1/2 k-va. motor-generator set may be used.
	www.widescreenmuseum.com /sound/rca03-23.htm (479 words)

	RotaDyne Rotary Phase Converter (Site not responding. Last check: 2007-10-15)
		This is a moving phase converter consisting of a rotating transformer and control panel.
		The RotaDyne phase converter is equipped with a unique starting cycle, which always allows it to start under mechanical or weather problems.
		Electric motors operated on phase converters can experience some torque limitations because overloads and starting currents cause the voltage of the produced phase to drop.
	www.willett.ca /RotaDyne.htm (1146 words)

	Saw Mill Creek - Kind of a Complex Gloat. (Long)
		Over a month or so I worked out a starting system for the rotary converter motor so that all I had to do was throw a switch and the phase converter started.
		The next issue was the rotary converter had to run for the table saw to start.
		Start a 5 hp rotary converter and leave it running the whole time or each time I needed the table saw, start the converter, start the table saw, cut, stop the table saw, stop the rotary converter.
	www.sawmillcreek.org /showthread.php?t=2889 (1967 words)

	SINGLE to 3 PHASE CONVERTER
		The rotary part of the rotary phase converter is a standard 3 phase electric motor called the idler motor.
		The converter will work fine without them, however you may only be able to get about 80% power from your 3 phase motors due to low current in the third line.
		If a motor near the size of the idler (which the static converter is sized for) is started, the start-up current can drop the line voltage for a fraction of a second and result in the start capacitor engaging.
	www.metalwebnews.com /howto/ph-conv/ph-conv.html (3326 words)

	Phasemaster Rotary Phase Converters - The world's most reliable single to three-phase converters
		A Phasemaster rotary three phase converter is simply the most reliable, least expensive way to run your 3-phase equipment.
		A Phasemaster rotary phase converter is engineered and built as a single, self-contained unit--not an erector set of capacitor panels, idler motors, and other components.
		Our conservative ratings mean that our 10 HP phase converter will start and run your 10 HP load-you won't need a 20 HP phase converter to do the job right.
	kayind.com /products_application/rotary_phase.htm (328 words)

	FAQs Single to Three phase rotary converters
		Yes, as a rotary converter is a linear device it produces a smooth sine wave similar to supply utility power.
		No, as the converters is a linear device and does not contain high speed switching devices EMC requirements are not a issue..
		Firstly it is not a standard motor, it's a compensation drive with a modified rotor that provides no torque, the windings are modified to react with the converter to produce the center phase only dependent on the draw or the demand placed on the center phase (L2) from the three phase output.
	www.polyphaz.com /faqr.html (593 words)

	Rotary Converter (Site not responding. Last check: 2007-10-15)
		Niagara Rotary Phase Converters are designed and constructed to provide a reliable source of three phase power, and simple to install.
		The RC rotary phase converter is designed to have a phase balance of 5 to 10% from phase to phase.
		The RC units are single voltage (230 or 460) and do not require balancing or adjustments at anytime.
	www.3-phaseconverter.com /rotaryconverter.htm (219 words)

	3 Phase Converter Info- Sales- rotary phase converter, static 3 phase rotary converters.
		Remember - using a larger phase converter than you currently need is safe, but one that is too small will not work.
		To find out more about why phase converters are selected as the 3 phase power source click here: Phase Converter Use.
		All our phase converters are built to last using the highest quality standards using only the highest quality supplies.
	www.phaseconverter.com (1285 words)

	Martin Phase Converters, Inc - Rotary Phase Converter
		THE ROTARY PHASE CONVERTER: The purpose of this device is to operate groups of 3 phase motors on 1 phase power.
		The Rotary is designed for those applications that require high starting torques for one or more large motors or groups of small motors.
		It has been our experience that Rotary converters are prone to very low starting torque.
	www.martinphaseconverters.com /rotaryphaseconverter.html (315 words)

	Building a Three Phase Converter
		While the auto-start feature is not required and thus adds a little complexity, the general construction rules of a rotary phase converter still apply.
		Rotary conversion begins once a three-phase motor has been started and is running on single phase in static mode.
		I had mentioned earlier that one of the benefits to automated starting was that the converter could be started from anywhere a set of stop/start buttons could be placed.
	www.metalwebnews.com /howto/phase-converter/phase-converter.html (1521 words)

	The second generation POLYPHAZ rotary converter
		converter in Australia for in excess of ten years, during this time we have seen some major improvements in machine tool design and control systems placing greater demands on the quality of power to operate these types of machine tools and control systems at their specified performance level.
		The term "Second generation" represents a total re-think of design, with the advent of lower cost microprocessors and ancillary equipment that was out of reach some years ago the time has now come for a redesigned rotary converter that meets the demands of modern equipment.
		when the converter is operating at no or low load the output voltage is trimmed to supply a balanced three phase supply thereby offering a saving of up to 30% in power costs when lightly loaded, when load is introduced so to is the output voltage compensated.
	members.iinet.net.au /~polyphaz/voltrak.html (337 words)

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