Patent ID: 11894787
Assignee: IRP NEXUS GROUP LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for efficiently providing drive power to a BrushLess Direct Current (BLDC) motor, comprising:
a) providing a BLDC motor having separate coils;
b) providing a controller for controlling levels and phases of input voltages supplied to said separate coils;
c) providing a controlled inverter with outputs, for applying phase separated input voltages to each of said separate coils at desired timing for each input voltage, determined by said controller;
d) providing a power source for feeding power to said controlled inverter;
e) for each motor type, generating and storing, in a memory, a look-up table containing a phase difference value that corresponds to each value power P;, said controller is adapted to:
f) sample an instantaneous angle φ of the rotor of said BLDC motor;
g) measure the input power P to all phases; and
h) for each input power P, retrieve from said look-up table, a corresponding phase difference Δφ value between one of the input voltages and others input voltages and an inverter's modulation level that corresponds to said input power P and feed said phase difference value to said controlled inverter.