Power supply controller for exercise equipment drive motor
First Claim
1. A combined power supply and driver control module, comprising:
- (a) a first connection for connecting the control module to an input power source;
(b) a rectifier circuit connected to the first connection for rectifying input voltage received from the input power source and providing a rectified output for producing a DC power;
(c) a switching device configured to receive the DC power and modulate input current received from the input power source;
(d) control circuitry for controlling the opening and closing of the switching device to modulate the input current received from the power source, the input current received from the power source being modulated by the switching device to be closer in phase with the voltage of the power source;
(e) a driver circuit connected to the switching device for providing an output power to a load; and
(f) a second connection for connecting the control module to the load.
1 Assignment
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Accused Products
Abstract
A combined power supply and driver control module includes rectifier circuitry, switching circuitry, and driver circuitry for providing output power to a load. Rectified output from an input power source is used to produce a DC power. The switching circuitry receives the DC power and modulates the input current drawn from the power source. An intelligent control module includes control circuitry, such as a digital processor, for controlling the switching circuitry. Power factor is improved by modulating the input current to be closer in phase with the voltage of the power source. Also disclosed is a power factor correction circuit in which a digital processor reads waveform values from a lookup table and modulates the input current waveform based on the values. A zero crossing detector connected to the input power source may direct the digital processor when to commence reading values from the lookup table.
101 Citations
40 Claims
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1. A combined power supply and driver control module, comprising:
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(a) a first connection for connecting the control module to an input power source;
(b) a rectifier circuit connected to the first connection for rectifying input voltage received from the input power source and providing a rectified output for producing a DC power;
(c) a switching device configured to receive the DC power and modulate input current received from the input power source;
(d) control circuitry for controlling the opening and closing of the switching device to modulate the input current received from the power source, the input current received from the power source being modulated by the switching device to be closer in phase with the voltage of the power source;
(e) a driver circuit connected to the switching device for providing an output power to a load; and
(f) a second connection for connecting the control module to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A power factor correction circuit, comprising:
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(a) an input connection for connecting the power factor correction circuit to an input power source;
(b) rectifier circuitry connected to the input connection for rectifying input voltage received from the input power source and providing a rectified output for producing a DC power;
(c) switching circuitry configured to receive the DC power and conduct input current from the input power source when the switching circuitry is closed; and
(d) a digital processor connected to the switching circuitry for controlling the opening and closing of the switching circuitry in accordance with instructions stored in a lookup table in a memory to modulate the input current received from the input power source, the lookup table containing values that collectively represent a current waveform, wherein the digital processor is configured to read values from the lookup table and modulate the input current received from the input power source based on the values read from the table. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of power factor correction in a circuit, comprising:
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(a) providing a switch that is configured to open and close, the switch conducting input current from an input power source when the switch is closed;
(b) sensing the voltage of the input power source;
(c) reading stored values from a memory, wherein the values collectively represent a current waveform; and
(d) modulating the opening and closing of the switch based on the values read from the memory to modulate the input current received from the input power source to be closer in phase with the voltage of the input power source. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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37. An article comprising a storage medium, the storage medium having instructions stored thereon in which, when the instructions are executed by a device, they cause the device to:
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(a) read stored values from a memory, wherein the values in the memory collectively represent a current waveform;
(b) sensing the voltage of the input power source;
(c) modulate the opening and closing of a switch that conducts current from an input power source when the switch is closed, wherein modulation of the switch is based on the values read from the memory and causes the switch to modulate the input current received from the input power source to be closer in phase with the input power source. - View Dependent Claims (38, 39, 40)
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Specification