Apparatus and method for preventing overload on switching device

Details Apparatus and method for preventing overload on switching device Apparatus and method for preventing overload on switching device

1999-01-25

2000-09-05

Sircus, Brian

Electricity: motive power systems

Induction motor systems

Primary circuit control

318430, 318431, 180 658, H02P 104, H02H 504

Patent

active

061148288

ABSTRACT:
In control apparatus and method for an electric vehicle, when the motor is determined to be locked during a run of the vehicle on an ascending slope, a limitation torque .tau.r of the motor as a function of a maximum value T.sub.JMAX of estimated junction temperatures of respective switching devices of an inverter circuit is determined, an output torque .tau.L for the motor to be escaped from the locked state is calculated as .tau.L=.tau..GAMMA.-.DELTA..tau., wherein .DELTA..tau. denotes a displacement torque, .DELTA..tau.=.DELTA..tau.+A when .tau.r<.tau.c and a phase domain of the motor determined on the basis of a magnetic pole position .theta. is the same as the previous one and .DELTA..tau.=0 when .tau.r.gtoreq..tau.c and the phase domain is not the same as the previous one.

REFERENCES:
patent: 3940669 (1976-02-01), Tsuboi et al.
patent: 5101315 (1992-03-01), Ishikawa et al.
patent: 5376869 (1994-12-01), Konrad
patent: 5444351 (1995-08-01), Yamamura et al.
patent: 5446362 (1995-08-01), Vanek et al.
patent: 5535115 (1996-07-01), Kishi et al.
patent: 5541494 (1996-07-01), Sannomiya et al.
patent: 5721479 (1998-02-01), Kumar et al.
patent: 5770901 (1998-06-01), Niimi et al.
patent: 5926010 (1999-07-01), Hosokawa et al.

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