Synchronous motors 2000–100,000 hp and synchronous condensers
Synchronous motors are custom-built machines rated from 2000 to 100,000 hp for heavy-duty drives with constant or adjustable speed.
- Power
- 2000–100,000 hp
- Power factor
- from 1.0 to 0.8 leading
- Drive
- direct-on-line start or VFD (PWM, LCI, cycloconverter)
- Rotor
- forged alloy steel shaft, laminated spider, poles on dovetails, copper damper winding
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Synchronous motors are custom-built machines rated from 2000 to 100,000 hp for heavy-duty drives with constant or adjustable speed. The company notes their main advantages: constant speed, high efficiency (higher than that of induction motors), low starting currents and a smaller supply voltage dip during starting, as well as a leading power factor. The rated power factor is usually between unity and 0.8 leading, so the motor supplies reactive power, compensating for the lagging power factor of the plant's other inductive loads. Starting, pull-in and maximum torques are selected over a wide range, and the maximum torque can be temporarily increased by field forcing. Synchronous condensers are supplied for local reactive power compensation as an alternative to capacitor banks. High efficiency is achieved through design measures: the choice of air gap, slot openings and slot ratios to reduce surface losses in the poles; non-ageing coated electrical steel; transposition of stator conductors; rational slot and yoke dimensions to reduce magnetic noise; a pole-piece shape that reduces leakage flux and losses in the field winding; fan selection. The rotor of high-speed machines is assembled on a forged shaft of high-strength alloy steel; a laminated spider carries the poles, which are fixed in dovetail slots with conical keys; field coils are wound on edge from copper strip, and the damper winding is of copper or copper alloy with shaped inter-pole connectors. Bearings are split sleeve bearings with a spherical seat, centrifugally cast babbitt and a four-element seal. The stator is laminated from segments and clamped with studs and welded tie bars. The motors operate from the mains with direct-on-line starting or from variable frequency drives (PWM, LCI, cycloconverter). According to the manufacturer, the adjustable synchronous motor is displacing DC motors in high-performance drives. Example: 12 vertical synchronous motors of 6000 hp with frequency control up to 450 rpm for a pumping station in Clearwater. Applications: rolling mills, ball and semi-autogenous mills, chippers, pulp refiners, mixers, pumps, fans, reciprocating and centrifugal compressors in the pulp and paper, chemical, metallurgical, mining and cement industries, water supply, air separation, power generation and marine applications; on request, per API 546. Large machines are manufactured and tested at the plant in Round Rock, Texas, USA, which has produced large DC motors since 1976, AC induction motors since 1977 and synchronous motors since 1978.
Technical specifications
| Power | 2000–100,000 hp |
|---|---|
| Power factor | from 1.0 to 0.8 leading |
| Drive | direct-on-line start or VFD (PWM, LCI, cycloconverter) |
| Rotor | forged alloy steel shaft, laminated spider, poles on dovetails, copper damper winding |
| Bearings | split sleeve with spherical seat, 4-element seal |
| Excitation | brush or brushless; synchronizing module |
| Standard | API 546 (on request) |
| Example | 12 vertical synchronous motors of 6000 hp with VFD, up to 450 rpm (Clearwater) |
Request a price and lead time
Synchronous motors 2000–100,000 hp and synchronous condensers. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
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