Pulse width modulated drive system for electronically commutated motors
First Claim
1. A drive system for an electronically commutated motor, comprising:
- an inverter for providing pulse width modulated drive signals for energizing an electronically commutated motor in response to control signals; and
a controller for generating the control signals and for applying the control signals to the inverter such that winding pairs of the electronically commutated motor are energized in a selected sequence, wherein the pulse width modulated drive signals comprise first and second pulses having first and second pulse widths, respectively, that are unequal, wherein the average voltage applied to the energized winding pair is a function of a time difference between the first and second pulse widths.
1 Assignment
0 Petitions
Accused Products
Abstract
Drive systems and methods for energizing electronically commutated motors are provided. A drive system includes an inverter for providing pulse width modulated drive signals for energizing an electronically commutated motor in response to control signals and a controller for generating the control signals and for applying the control signals to the inverter such that winding pairs of the electronically commutated motor are energized in a selected sequence. The pulse width modulated drive signals include first and second pulses having first and second pulse widths, respectively, that are unequal. The average voltage applied to the energized winding pair is a function of the time difference between the first and second pulse widths.
-
Citations
28 Claims
-
1. A drive system for an electronically commutated motor, comprising:
-
an inverter for providing pulse width modulated drive signals for energizing an electronically commutated motor in response to control signals; and
a controller for generating the control signals and for applying the control signals to the inverter such that winding pairs of the electronically commutated motor are energized in a selected sequence, wherein the pulse width modulated drive signals comprise first and second pulses having first and second pulse widths, respectively, that are unequal, wherein the average voltage applied to the energized winding pair is a function of a time difference between the first and second pulse widths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 26)
-
-
13. A method for energizing an electronically commutated motor, comprising:
energizing pairs of windings of an electronically commutated motor with pulse width modulated drive signals in a selected sequence, said pulse width modulated drive signals comprising first and second pulses having first and second pulse widths, respectively, that are unequal, wherein the average voltage applied to the energized winding pair is a function of a time difference between the first and second pulse widths. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
21. A motor system comprising:
-
an electronically commutated motor including a plurality of windings;
an inverter for providing pulse width modulated drive signals for energizing said electronically commutated motor in response to control signals; and
a controller for generating the control signals and for applying the control signals to the inverter such that winding pairs of the electronically commutated motor are energized in a selected sequence, wherein the pulse width modulated drive signals comprise first and second pulses having first and second pulse widths, respectively, that are unequal, wherein the average voltage applied to the energized winding pair is a function of a time difference between the first and second pulse widths. - View Dependent Claims (22, 23, 24, 25, 27, 28)
-
Specification