Back to results
US 7,679,302 B1Granted
Circuit for forming phase shifted signals for three phase BLDC motor control
AssigneeCypress Semiconductor Corporation
InventorsViktor Kremin, Andrey Magarita
Life of this patent
Estimating the term…
Abstract
Disclosed is a controller circuit, comprising a plurality of sense inputs, an instrumentation amplifier block having inputs coupled to the plurality of sense inputs, a filter block coupled to the instrumentation amplifier block, a sum function coupled to the filter block, and a crossing detector block coupled to the filter block and the sum function. A method of controlling motor signals is further described.
Claims19
A controller circuit, comprising:
- a plurality of sense inputs;
- an instrumentation amplifier block having inputs coupled to the plurality of sense inputs;
- a filter block coupled to the instrumentation amplifier block;
- a sum function coupled to the filter block;
- and
- a crossing detector block coupled to the filter block and the sum function;
- and
- a phase switching logic block coupled to the crossing detector block, wherein the phase switching logic block is configured to generate a plurality of motor drive signals.
5 more elements
A method of controlling drive signals, comprising:
- receiving a plurality of phase signals;
- generating a first phase difference signal and generating a second phase difference signal from the plurality of phase signals;
- filtering the first phase difference signals and the second phase difference signal;
- summing the first phase difference signals and the second phase difference signals;
- determining a plurality of zero crossing points of phase difference signals;
- and
- generating a plurality of motor drive signals.
4 more elements
A circuit for controlling a motor, comprising:
- means for determining a first difference between a first pair of sense inputs;
- means for determining a second difference between a second pair of sense inputs;
- means for filtering the first difference and second difference;
- means for summing the filtered first difference and filtered second difference;
- means for determining whether the first difference, second differences and sum of the filtered first difference and filtered second difference cross a threshold;
- and
- means for generating a plurality of motor drive signals based on whether at least one of the first difference, second difference, and the sum of the filtered first difference and filtered second difference cross the threshold.
4 more elements
Dependencies are inferred from the claim text.