Thermal regulation of AC drive

Details Thermal regulation of AC drive Thermal regulation of AC drive

2007-12-25

2007-12-25

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

C318S380000, C388S903000, C388S934000

Reexamination Certificate

active

11507134

ABSTRACT:
An apparatus for the thermal regulation of an AC drive for providing power to a motor includes a temperature sensor producing a signal indicative of temperature, a heater resistor connectable across a DC link of the AC drive, and a first switch. A controller is operable to monitor the temperature signal and control the first switch to provide power via the DC link to the heater resistor if the sensed temperature is below a predetermined setpoint.

REFERENCES:
patent: 3794898 (1974-02-01), Gross
patent: 4039914 (1977-08-01), Steigerwald et al.
patent: 4453114 (1984-06-01), Nordlund
patent: 5814954 (1998-09-01), Suzuki et al.
patent: 6081086 (2000-06-01), Roth-Stielow et al.
patent: 6577483 (2003-06-01), Steicher et al.
patent: 6956751 (2005-10-01), Youm et al.

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