JPH03226297A - Controller for air-conditioner - Google Patents

Controller for air-conditioner

Info

Publication number
JPH03226297A
JPH03226297A JP2237021A JP23702190A JPH03226297A JP H03226297 A JPH03226297 A JP H03226297A JP 2237021 A JP2237021 A JP 2237021A JP 23702190 A JP23702190 A JP 23702190A JP H03226297 A JPH03226297 A JP H03226297A
Authority
JP
Japan
Prior art keywords
induction motor
frequency
power factor
overload
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2237021A
Other languages
Japanese (ja)
Inventor
Hitoshi Tanifuji
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP33070589 priority Critical
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of JPH03226297A publication Critical patent/JPH03226297A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable continuous operation even when the frequency/voltage characteristic is set at the maximum efficiency point or even under overload conditions by performing control such that overload of an induction motor is judged based on the output from a power factor comparing means and the voltage of an induction motor is boosted while the frequency thereof is lowered.
CONSTITUTION: The controller for air-conditioner comprises means 14 for detecting the power factor of an induction motor 6, means 15 for comparing thus detected power factor with an arbitrarily set power factor, and means 16 for judging overload of the induction motor 6 based on the output from the means 15 and boosting the voltage of the induction motor 6 while lowering the frequency thereof. Overload of the induction motor 6 causes significant variation of power factor, and thereby the overload detecting means 16 controls the voltage and frequency of the induction motor 6. Consequently, current of the induction motor is prevented from increasing under overload conditions even if the frequency/voltage characteristics of the induction motor 6 are set at maximum efficiency points.
COPYRIGHT: (C)1991,JPO&Japio
JP2237021A 1989-12-20 1990-09-10 Controller for air-conditioner Pending JPH03226297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33070589 1989-12-20

Publications (1)

Publication Number Publication Date
JPH03226297A true JPH03226297A (en) 1991-10-07

Family

ID=18235640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2237021A Pending JPH03226297A (en) 1989-12-20 1990-09-10 Controller for air-conditioner

Country Status (1)

Country Link
JP (1) JPH03226297A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009028465A1 (en) * 2007-08-28 2009-03-05 Max Co., Ltd. Air compressor and method of controlling motor drive
CN109981029A (en) * 2019-03-29 2019-07-05 四川虹美智能科技有限公司 A kind of control method and device of motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009028465A1 (en) * 2007-08-28 2009-03-05 Max Co., Ltd. Air compressor and method of controlling motor drive
CN109981029A (en) * 2019-03-29 2019-07-05 四川虹美智能科技有限公司 A kind of control method and device of motor

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