Title:
A DRIVING CONTROL SYSTEM FOR ELECTRIC MOTORS
Document Type and Number:
WIPO Patent Application WO1999031794
Kind Code:
A3
Abstract:
A driving control system for electric motors, of the type used in refrigeration compressors and including: a power source (20) in direct current having, between positive (21) and negative (22) terminals of equal voltage, a median terminal (25), of null voltage, to which is directly connected a first coil (11) of the electric motor (10); an inverter (30) provided with N-1 commutation arms with opposite ends connected to the power source (20) and each including switch means, each commutation arm being medianly connected to a respective coil; and a control unit (40) operating the switch means, as a function of the signals received from a position sensor means (50), in order to determine to said switch means, in each of a first and a second switching condition thereof, a switching frequency and a switch conduction period, which are defined in order to be effectively applied to the coils a voltage effectively corresponding to the speed and torque required for the motor.
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Inventors:
DAINEZ PAULO SERGIO (BR)
SCHWARZ MARCOS GUILHERME (BR)
SCHWARZ MARCOS GUILHERME (BR)
Application Number:
PCT/BR1998/000107
Publication Date:
August 24, 2000
Filing Date:
November 27, 1998
Export Citation:
Assignee:
BRASIL COMPRESSORES SA (BR)
DAINEZ PAULO SERGIO (BR)
SCHWARZ MARCOS GUILHERME (BR)
DAINEZ PAULO SERGIO (BR)
SCHWARZ MARCOS GUILHERME (BR)
International Classes:
H02P6/08; (IPC1-7): H02P6/08; H02M3/48; H02P7/628
Foreign References:
US5406185A | 1995-04-11 | |||
EP0613234A1 | 1994-08-31 | |||
US4135235A | 1979-01-16 |
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