Control device for driving regulating motor
AssigneeRexon Industrial Corp., Ltd.
InventorYen-Chih Chang
Life of this patent
Estimating the term…
Abstract
A control device for driving a regulating motor driven by direct current (DC) includes a changeover mechanism having a first normally closed (NC) switch, a second NC switch, a first normally open (NO) switch, and a second NO switch, a power-supply module for providing DC for the regulating motor, a first operating switch for driving the regulating motor to rotate in a first direction while the two NC switches become open circuit and the two NO switches become short-circuit resulting from that the first operating switch is short-circuit, and a second operating switch for driving the regulating motor to rotate in a second direction opposite to the first direction. In light of these, the control device can control the rotational direction of the regulating motor by means of simple circuitry.
Claims19
A control device for driving a regulating motor which is driven by direct current (DC) and has a rotational shaft, a first power terminal and a second power terminal, said control device comprising:
- a changeover mechanism having a first normally closed (NC) switch, a second NC switch, a first normally open (NO) switch, and a second NO switch;
- a power-supply module for providing said regulating motor with DC power;
- a first line connecting said power-supply module and said first power terminal, and said first NO switch serially connected therein;
- a second line connecting with said power-supply module and said second power terminal, and said first NC switch serially connected therein, wherein said first and second lines connecting with the same one polarity of said power-supply module;
- a third line connecting with said power-supply module and said first power terminal, and said second NC switch serially connected therein;
- a fourth line connecting with said power-supply module and said second power terminal, and said second NO switch serially connected therein, wherein said third and fourth lines connecting with the other polarity of said power-supply module;
- a first operating switch for driving said rotational shaft of said regulating motor to rotate, wherein said rotational shaft rotates in a first direction while said two NC switches become open-circuit and said two NO switches become short-circuit resulting from that said first operating switch become short-circuit;
- and
- a second operating switch for driving said rotational shaft of said regulating motor to rotate in a second direction opposite to said first direction.
A table saw machine comprising:
- a bench having a saw slot, for carrying a workpiece;
- a base frame connecting with said bench for supporting said bench;
- a saw blade passing through said saw slot for cutting said workpiece;
- a saw holder mounted in said base frame, connecting with said saw blade and having an adjustor for moving said saw blade relative to said bench, and a saw motor for driving said saw blade;
- a regulating motor driven by DC power and having a rotational shaft for moving said adjustor so as to synchronously moving said saw blade, a first power terminal and a second power terminal;
- and
- a control device for controlling the rotational direction of said rotational shaft of said regulating motor and comprising:
- a changeover mechanism having a first NC switch, a second NC switch, a first NO switch, and a second NO switch;
- a power-supply module for providing said regulating motor with DC power;
- a first line connecting with said power-supply module and said first power terminal, and said first NO switch serially connected therein;
- a second line connecting with said power-supply module and said second power terminal, and said first NC switch serially connected therein, wherein said first and second lines connect with the same one polarity of said power-supply module;
- a third line connecting with said power-supply module and said first power terminal, and said second NC switch serially connected therein;
- a fourth line connecting with said power-supply module and said second power terminal, and said second NO switch serially connected therein, wherein said third and fourth lines connect with the other polarity of said power-supply module;
- a first operating switch for driving said rotational shaft of said regulating motor to rotate, wherein said rotational shaft rotates in a first direction while said two NC switches become open-circuit and said two NO switches become short-circuit resulting from that said first operating switch become short-circuit;
- and
- a second operating switch for driving said rotational shaft of said regulating motor to rotate in a second direction opposite to said first direction.
Dependencies are inferred from the claim text.