Inverter and air conditioner controlled by normal and defrost en

Details Inverter and air conditioner controlled by normal and defrost en Inverter and air conditioner controlled by normal and defrost en

1993-12-17

1995-07-25

Wysocki, Jonathan

Electricity: motive power systems

Induction motor systems

Primary circuit control

318811, 62151, 622284, H02P 5418

Patent

active

054365473

ABSTRACT:
An inverter controlling an air conditioner including a brushless motor serving as a compressor motor. A microcomputer detects the rotational position of a rotor of the brushless motor from signals obtained by comparison of each of terminal voltages of the motor windings with a reference voltage in order to determine a commutation time. In a normal operation, the microcomputer forms, according to a normal energization signal forming pattern, energization signals corresponding to every commutation time at every occurrence of the commutation time, so that the motor windings are sequentially energized. When frost forms on an outdoor heat exchanger of a heat pump during a warming operation and a defrosting operation is necessary, the energization signals are formed according to a loss increasing energization signal forming pattern so that loss increasing energization signals for causing the rotor to produce counter torque are added to the respective energization signals formed according to the normal pattern. As a result, the brushless motor loss is increased and the brushless motor generates heat. The generated heat is used for defrosting the outdoor heat exchanger.

REFERENCES:
patent: 4467613 (1984-08-01), Behr et al.
patent: 4698774 (1987-10-01), Itani et al.
patent: 5144812 (1992-09-01), Mills, Jr. et al.
patent: 5189886 (1993-03-01), Terauchi
patent: 5271238 (1993-12-01), Powell et al.
patent: 5275012 (1994-01-01), Dage et al.
patent: 5319943 (1994-06-01), Bahel et al.

Affiliated with

Also associated with

Rating

Inverter and air conditioner controlled by normal and defrost en does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Inverter and air conditioner controlled by normal and defrost en, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inverter and air conditioner controlled by normal and defrost en will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-742038