PATENT CLAIM ANALYSIS

Application Number: 15744923
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["318", "700000"]

Abstract:
A synchronous motor control device includes: a DC power supply; an inverter main circuit; a three-phase synchronous motor; and an inverter control unit that outputs a PWM signal used to control the inverter main circuit. The inverter control unit includes: a PWM signal generation unit; a start-up control unit that outputs a start-up voltage command value to the PWM signal generation unit at the time of start-up; a steady state control unit that calculates a steady state voltage command value in a steady state and outputs the value to the PWM signal generation unit; and a steady state control parameter initial value calculation unit that outputs an initial value of a control parameter to the steady state control unit such that an output voltage vector from the inverter main circuit to the three-phase synchronous motor is consistent before and after switching from the start-up to the steady state.

Claim (Index 1):
A synchronous motor control device comprising:\n an inverter main circuit that is connected to a DC power supply and formed of a plurality of switching devices; a synchronous motor that is driven by AC power output from the inverter main circuit; a current detector that detects a phase current value of the synchronous motor; a voltage detector that detects a DC voltage value of the DC power supply; and an inverter controller that receives an angular velocity command value, the phase current value and the DC voltage value as input, generates a PWM signal used to control turning on and off of the plurality of switching devices, and outputs the signal to the inverter main circuit, wherein the inverter controller operating in a different operating mode at the time of start-up and in a steady state includes:\n a PWM signal generator that generates the PWM signal output to the inverter main circuit; \n a start-up controller that outputs a start-up voltage command value corresponding to the phase current value to the PWM signal generator when operating in the operating mode at the time of start-up; \n a steady state controller that calculates a steady state voltage command value by using a voltage equation and outputs the value to the PWM signal generation unit when operating in the operating mode in the steady state; and \n a steady state control parameter initial value calculator that outputs an initial value of a control parameter to be used in the steady state controller to the steady state controller such that an output voltage vector from the inverter main circuit to the synchronous motor is consistent before and after switching from the operating mode at the time of start-up to the operating mode in the steady state.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 86.0
- Lexical Diversity: 3.03846
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15574504', '11993278', '13596550', '12407289', '12525580']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6760408845124589
- 35 USC 102 Novelty (BERT): 0.4986285922374396
- Combined Prediction Score: 0.658299655284957
- Mean Citation Score: 236.246794
- Max Citation Score: 284.57346
- Similarity Product: 239.6697132841086

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test