Electronic control arrangement
First Claim
1. A motorized assembly comprising:
- first and second bridge circuits, the two arms of each bridge circuit each comprising a first and a second electronic switch connected in series;
a respective drive motor connected between the two arms of each bridge circuit, at points intermediate the electronic switches of each of the two arms;
an auxiliary motor or actuator connected between one arm of the first bridge circuit and one arm of the second bridge circuit, at points intermediate the electronic switches of each of the two arms and in series with at least one electronic switch; and
electronic control means arranged to operate the electronic switches to selectively control the operation of the drive motors and the auxiliary motor or actuator.
3 Assignments
0 Petitions
Accused Products
Abstract
A motorized assembly comprises first and second bridge circuits across which respective drive motors are connected. At least one auxiliary motor or actuator is connected between one arm of the first bridge circuit and one arm of the second bridge circuit and electronic control means are arranged to control the operation the drive motors and the or each auxiliary motor or actuator by operating electronic switches of the bridge circuits and an electronic switch connected in series with the or each auxiliary motor or actuator. Such an arrangement obviates the requirement for independent control circuitry for controlling the operation of the or each auxiliary motor or actuator, resulting in a reduction in the overall cost of the motorized assembly.
9 Citations
15 Claims
-
1. A motorized assembly comprising:
-
first and second bridge circuits, the two arms of each bridge circuit each comprising a first and a second electronic switch connected in series;
a respective drive motor connected between the two arms of each bridge circuit, at points intermediate the electronic switches of each of the two arms;
an auxiliary motor or actuator connected between one arm of the first bridge circuit and one arm of the second bridge circuit, at points intermediate the electronic switches of each of the two arms and in series with at least one electronic switch; and
electronic control means arranged to operate the electronic switches to selectively control the operation of the drive motors and the auxiliary motor or actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An electronic control arrangement for a motorized assembly and comprising:
-
first and second bridge circuits, the two arms of each bridge circuit each comprising a first and a second electronic switch connected in series;
a further electronic switch arranged to be connected in series with a motor or actuator between one arm of the first bridge circuit and one arm of the second bridge circuit, at points intermediate the electronic switches of each of the two arms; and
electronic control means arranged to selectively operate the electronic switches.
-
-
14. A switching arrangement for connecting a motor or actuator to a pulse-width modulated supply, and comprising:
-
a Field Effect Transistor (FET) arranged to be connected in series with the motor or actuator; and
a capacitor connected between the gate and source of the transistor, the capacitor forming a bootstrapped gate supply for maintaining conduction between the drain and source of the transistor whilst the pulse-width modulated supply is applied to the motor or actuator thereby. - View Dependent Claims (15)
-
Specification