TEMPERATURE CONTROLLER HAVING PHASE CONTROL AND ZERO-CROSS CYCLE CONTROL FUNCTIONALITY

• US 20110046811A1
• Filed: 09/08/2009
• Published: 02/24/2011
• Est. Priority Date: 09/27/2008
• Status: Active Grant

• Current Assignee: Autonics Corporation
• Original Assignee: Autonics Corporation
• Inventors: Park, Hwan-Ki
• Granted Patent: US 8,645,000 B2
• Time in Patent Office: Days
• US Class Current: 700/300
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G05D 23/22 the sensing element being a thermocouple

Abstract

The present invention relates to a temperature controller having phase control and zero-cross cycle control function that can be achieved at a low cost by controlling power that is supplied to a load, by generating a phase control signal or a zero-cross control signal according to control target temperature of a load, using a microcomputer.

Claims

1. A temperature controller having phase control and zero-cross cycle control function that controls a load at a preset target temperature by performing phase control or zero-cross control on power supplied to a load after sensing and analyzing temperature of the load with a temperature sensor, the temperature controller comprising:

a power supply synchronization circuit part that extracts a synchronization signal from an AC power;

a power circuit part in which an AC power supply is connected to a first coil of a transformer, and a drive power generation part and a triac trigger power generation part are respectively furnished on a second coil;

a microcomputer that generates a phase control signal or a zero-cross cycle control signal to analyze temperature of the load sensed by a temperature sensor and control the temperature to target temperature; and

a triac drive part that applies power generated from the trigger power supply generation part as a trigger signal to a gate of a triac connected to the load in accordance with a phase control signal or a zero-cross cycle control signal of the microcomputer.

2. The temperature controller having phase control and zero-cross cycle control functions according to claim 1, wherein the power supply synchronization circuit is provided with a photo coupler to maintain insulation between the AC power supply and the microcomputer.

3. The temperature controller having phase control and zero-cross cycle control functions according to claim 1, wherein the power triac drive part is provided with a photo coupler to maintain insulation between the microcomputer and the load side triac.

4. The temperature controller having phase control and zero-cross cycle control function according to claim 1, wherein the phase control function or the zero-cross cycle control function of the microcomputer is selected by a user operation part.

5. The temperature controller having phase control and zero-cross cycle control functions according to claim 2, wherein the power triac drive part is provided with a photo coupler to maintain insulation between the microcomputer and the load side triac.