MY105546A - Electric motor controls and laundry machines using such motor controls - Google Patents

Electric motor controls and laundry machines using such motor controls

Info

Publication number
MY105546A
MY105546A MYPI92000302A MYPI19920302A MY105546A MY 105546 A MY105546 A MY 105546A MY PI92000302 A MYPI92000302 A MY PI92000302A MY PI19920302 A MYPI19920302 A MY PI19920302A MY 105546 A MY105546 A MY 105546A
Authority
MY
Malaysia
Prior art keywords
reversing
condition
motor controls
motor
reversal
Prior art date
Application number
MYPI92000302A
Inventor
David Duncan Gerald
Original Assignee
Fisher & Paykel Appliances Ltd
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 claimed from NZ213490A external-priority patent/NZ213490A/en
Application filed by Fisher & Paykel Appliances Ltd filed Critical Fisher & Paykel Appliances Ltd
Publication of MY105546A publication Critical patent/MY105546A/en

Links

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

A CONTROL APPARATUS AND METHOD FOR AN ELECTRIC MOTOR HAVING SENSING DEVICES WHICH SENSE THE FREQUENCY AND POLARITY OF EMFS IN THE ROTOR WINDINGS DOWN TO A CONDITION WHERE THE ROTOR IS IN CONDITION FOR REVERSING, AND CAUSING REVERSING OF THE MOTOR WHEN THE FREQUENCY IS SUCH AS TO ALLOW REVERSING AND THE POLARITS OF A SELECTED WINDING IS AT OR NEAR A ZERO CROSSING BETWEEN POSITIVE AND NEGATIVE POLARITIES. CYCLICAL REVERSAL IS EFFECTED BY MEASURING THE TIME THE ROTOR TAKES TO COAST FROM A "POWER OFF" CONDITION TO THE CONDITION FOR REVERSING AND WITH AN ELECTRONICALLY COMMUTATED MOTOR REVERSING CAN USUALLY BE EFFECTED IN ONE COMMUTATION PERIOD. THE MOTOR IS USED IN A CLOTHES WASHING MACHINE OR SIMILAR APPLICATION WHERE RAPID REVERSAL IS REQUIRED OR TIMING OF THE TIME FROM ONE REVERSAL TO THE NEXT IS REQUIRED TO BE CONSTANT. (FIG. 1)
MYPI92000302A 1985-09-16 1987-05-11 Electric motor controls and laundry machines using such motor controls MY105546A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ213490A NZ213490A (en) 1985-09-16 1985-09-16 Cyclic motor reversal by forced commutation

Publications (1)

Publication Number Publication Date
MY105546A true MY105546A (en) 1994-10-31

Family

ID=79601435

Family Applications (3)

Application Number Title Priority Date Filing Date
MYPI92000302A MY105546A (en) 1985-09-16 1987-05-11 Electric motor controls and laundry machines using such motor controls
MYPI87000633A MY102857A (en) 1985-09-16 1987-05-11 Improvements in or relating to electronic motor controls, laundry machines including such controls and/or methods of operating such controls.
MYPI92000299A MY105547A (en) 1985-09-16 1987-05-11 Electric motor controls and laundry machines using such motor controls

Family Applications After (2)

Application Number Title Priority Date Filing Date
MYPI87000633A MY102857A (en) 1985-09-16 1987-05-11 Improvements in or relating to electronic motor controls, laundry machines including such controls and/or methods of operating such controls.
MYPI92000299A MY105547A (en) 1985-09-16 1987-05-11 Electric motor controls and laundry machines using such motor controls

Country Status (1)

Country Link
MY (3) MY105546A (en)

Also Published As

Publication number Publication date
MY102857A (en) 1993-03-31
MY105547A (en) 1994-10-31

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