MOTOR CONTROL SYSTEM
First Claim
Patent Images
1. A motor control system, comprising:
- (a) a rectifier module enclosed in a first flame-proof enclosure, wherein the rectifier module has a first input and includes one or more rectifier circuits configured to convert a first AC voltage at the first input to a DC voltage to be output to a DC bus; and
(b) one or more variable-frequency drive (VFD) modules, each VFD module being enclosed in a respective second flame-proof enclosure and having a second input coupled to the DC bus, wherein each VFD module includes one or more inverter circuits configured to convert the DC voltage on the DC bus to a second AC voltage to be output to one or more motors.
2 Assignments
0 Petitions
Accused Products
Abstract
In one aspect of the present invention, a motor control system includes a rectifier module enclosed in a first flame-proof enclosure, and having a first input and one or more rectifier circuits configured to convert a first AC voltage at the first input to a DC voltage to be output to a DC bus, and one or more variable-frequency drive (VFD) modules, each VFD module being enclosed in a respective second flame-proof enclosure and having a second input coupled to the DC bus, where each VFD module includes one or more inverter circuits configured to convert the DC voltage on the DC bus to a second AC voltage to be output to one or more motors.
-
Citations
18 Claims
-
1. A motor control system, comprising:
-
(a) a rectifier module enclosed in a first flame-proof enclosure, wherein the rectifier module has a first input and includes one or more rectifier circuits configured to convert a first AC voltage at the first input to a DC voltage to be output to a DC bus; and (b) one or more variable-frequency drive (VFD) modules, each VFD module being enclosed in a respective second flame-proof enclosure and having a second input coupled to the DC bus, wherein each VFD module includes one or more inverter circuits configured to convert the DC voltage on the DC bus to a second AC voltage to be output to one or more motors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A motor control system for a mining equipment, comprising:
-
(a) a rectifier module enclosed in a first flame-proof enclosure, wherein the rectifier module has a first input and includes three rectifier circuits configured to convert a three-phase first AC voltage at the first input to a DC voltage to be output to a DC bus, each rectifier circuit coupled to a respective phase of the first AC voltage; and (b) one or more VFD modules, each VFD module being enclosed in a respective second flame-proof enclosure and having a second input coupled to the DC bus, wherein each VFD module includes three inverter circuits configured to convert the DC voltage on the DC bus to a three-phase second AC voltage to be output to one or more motors, each inverter circuit corresponding to a respective phase of the second AC voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
Specification