Microcontroller architecture for power factor correction converter
First Claim
1. A circuit for driving a motor of a compressor, the circuit comprising:
- a microcontroller configured to generate a reference current value for a power factor correction (PFC) converter; and
a programmable logic device configured to;
receive control messages from the microcontroller;
in response to receiving a first control message from the microcontroller, set a value into an off-time register based on data in the first control message;
control a power switch of the PFC converter to turn off in response to receiving a comparison signal indicating that a measured current in the PFC converter exceeds the reference current value; and
subsequent to controlling the power switch to turn off, wait for a period of time determined by the off-time register before controlling the power switch to turn on.
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Abstract
A circuit for driving a motor of a compressor includes a microcontroller that generates a reference current value for a power factor correction (PFC) converter. A programmable logic device (PLD) receives control messages from the microcontroller. The PLD sets a value in an off-time register based on a control message from the microcontroller. The PLD controls a power switch of the PFC converter to turn off in response to receiving a comparison signal indicating that a measured current in the PFC converter exceeds the reference current value. Subsequent to controlling the power switch to turn off, the PLD waits for a period of time determined by the off-time register before controlling the power switch to turn on.
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Citations
20 Claims
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1. A circuit for driving a motor of a compressor, the circuit comprising:
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a microcontroller configured to generate a reference current value for a power factor correction (PFC) converter; and a programmable logic device configured to; receive control messages from the microcontroller; in response to receiving a first control message from the microcontroller, set a value into an off-time register based on data in the first control message; control a power switch of the PFC converter to turn off in response to receiving a comparison signal indicating that a measured current in the PFC converter exceeds the reference current value; and subsequent to controlling the power switch to turn off, wait for a period of time determined by the off-time register before controlling the power switch to turn on. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A control method for a programmable logic device, the method comprising:
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in response to the programmable logic device receiving a first control message from a microcontroller, setting a value based on data in the first control message into an off-time register of the programmable logic device; in response to the programmable logic device receiving a comparison signal indicating that a measured current in a power factor correction (PFC) converter exceeds a reference current value, (i) controlling, using the programmable logic device, a power switch of the PFC converter to turn off and (ii) starting a timer; and controlling, using the programmable logic device, the power switch to turn on in response to a value of the timer reaching the value in the off-time register. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification