PATENT CLAIM ANALYSIS

Application Number: 15885994
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["318", "400200"]

Abstract:
A BLDC motor drive system may be configured to provide a programmable PWM current waveform, e.g., a sinusoidal PWM current, to the motor. The drive system may include control electronics configured to generate a series of PWM control signals at a control signal frequency based on (a) the present motor speed data as determined by an angular timer, based on sensor-based rotor angle data, (b) a target motor speed, e.g., based on a thermal management unit, and (c) stored current waveform data defining a target current for each angular segment of the BDLC rotor, the target currents defining an non-rectangular waveform shape. The PWM control signals are used by a PWM unit to produce a non-rectangular, e.g., sinusoidal, PWM current for controlling the BDLC.

Claim (Index 10):
A system, comprising:\n a brushless direct current (BLDC) motor; and a motor drive system for driving the BDLC with a programmable current waveform, the motor drive system comprising:\n an angular timer configured to:\n receive rotor position data indicating an angular position of a rotor of the BLDC; \n determine present motor speed data associated with a present speed of the rotor based on the received rotor position data; \n \n a target motor speed control unit configured to generate target motor speed data indicating a target motor speed; \n current waveform data defining a target current for each of a series of angular segments in a rotation of the BLDC rotor, the target current for the series of angular segments defining a current waveform having a non-rectangular shape; \n PWM control electronics configured to generate a series of pulse width modulation (PWM) control signals at a control signal frequency based on:\n the present motor speed data determined by the angular timer; \n the target motor speed data generated by the target motor speed control unit; and \n the current waveform data defining the shape of the target current waveform; \n \n wherein the series of PWM control signals generated by the PWM control electronics correspond with the series of angular segments in the rotation of the BLDC rotor, wherein each PWM control signal indicates a target current for a respective angular segment; and \n a PWM unit configured to receive the series of PWM control signals from the PWM control electronics at the control signal frequency and produce a PWM current for controlling the BDLC; \n wherein for each respective PWM control signal received by the PWM unit, the respective PWM control signal indicating a target current magnitude for a respective angular segment, the PWM unit is configured to dynamically control at least one pulse characteristic to produce a PWM segment current corresponding with the target current for the respective angular segment indicated by the respective PWM control signal; \n wherein the PWM segment current for at least one angular segment includes PWM pulsing at a higher frequency than the control signal frequency.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 88.0
- Lexical Diversity: 2.16418
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13959543', '15276887', '11061794', '13508367', '15448568']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6785507436283801
- 35 USC 102 Novelty (BERT): 0.4907359413859672
- Combined Prediction Score: 0.6597692634041388
- Mean Citation Score: 233.142376
- Max Citation Score: 249.48042
- Similarity Product: 195.41720564165

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test