Method of energizing a polyphase motor having an increased energy efficiency
AssigneeKoninklijke Philips Electronics N.V.
InventorsEmeric Uguen, Henricus Cornelis Johannes Buthker, Henricus Marinus Van Hout
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Abstract
The invention relates to a method of energizing a polyphase motor by means of a plurality of coils (E1, E2, E3), each coil intended to be excited by means of a control signal (I1, I2, I3). The method in accordance with the invention comprises the following steps: identifying the control signal having the largest absolute value, and connecting the corresponding coil to a reference-potential terminal (VCC or GND). The invention enables the losses caused by switching operations in the power stages energizing the coils to be reduced, and to increase the efficiency of the power supply device of the motor.
Claims12
A method of energizing a polyphase motor by means of a plurality of coils, each coil intended to be excited by means of a control signal, comprising:
- identifying the control signal having the largest absolute value by detecting a sign reversal of a control signal;
- and
- connecting a coil excited by said control signal having the largest absolute value to a reference-potential terminal.
A method of energizing a polyphase motor by means of a plurality of coils, each coil intended to be excited by means of a control signal, comprising:
- identifying the control signal having the largest instantaneous value by detecting a sign reversal of a control signal;
- and
- connecting a coil excited by said control signal having the largest instantaneous value to a reference-potential terminal.
A method of energizing a polyphase motor by means of a plurality of coils, each coil intended to be excited by means of a control signal, comprising:
- identifying the control signal having the smallest instantaneous value by detecting a sign reversal of a control signal;
- and
- connecting a coil excited by said control signal having the smallest instantaneous value to a reference-potential terminal.
A device for supplying power to a polyphase motor comprising a plurality of coils, each coil intended to be excited by means of a control signal, which device comprises:
- control means enabling each coil to be alternately connected to one reference-potential terminal, and
- identification means enabling identification of the coil which is to be connected to the reference-potential terminal and comprising means for detecting a sign reversal of a control signal from said control means.
Dependencies are inferred from the claim text.