Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1993-12-17
1996-02-20
Sircus, Brian
Electricity: motive power systems
Switched reluctance motor commutation control
318439, H02P 118
Patent
active
054931894
ABSTRACT:
A switching scheme for driving a three-phase DC motor includes a first end of a first coil 20 coupled to a first end of a second coil 22 and a first end of a third coil 24. A first high side transistor 32 is coupled between a voltage source and a second end of the first coil 20. A second high side transistor 34 is coupled between the voltage source and a second end of the second coil 22. A third high side transistor 36 is coupled between the voltage source and a second end of the third coil 24. A first low side transistor 38 is coupled between the second end of the first coil 20 and a resistor 56. A second low side transistor 40 is coupled between the second end of the second coil 22 and the resistor 56. A third low side transistor 42 is coupled between the second end of the third coil 24 and the resistor 56. An output of a first low side driver 26 is coupled to a gate of the first low side transistor 38. An output of a second low side driver 28 is coupled to a gate of the second low side transistor 40. An output of a third low side driver 30 is coupled to a gate of the third low side transistor 42. A low side reference voltage is coupled to a first input of each of the three low side drivers 26, 28, and 30. The resistor 56 is coupled to a second input of each of the low side drivers 26, 28, and 30. Pre-charge circuitry 64 is coupled to the output of each of the three low side drivers 26, 28, and 30. The pre-charge circuitry 64 provides a pre-charge signal to each of the three low side drivers 26, 28, and 30.
REFERENCES:
patent: 3631262 (1971-12-01), Jarrett
patent: 5191269 (1993-03-01), Carbolante
patent: 5204593 (1993-04-01), Uehi
patent: 5210474 (1993-05-01), Oswald
patent: 5397967 (1995-03-01), Carbolante et al.
Krenik William
Ling Kuok Y.
Donaldson Richard L.
Hiller William E.
Sircus Brian
Stewart Alan K.
Texas Instruments Incorporated
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