Apparatus and method for controlling temperature
AssigneeLsis Co., Ltd.
InventorYONG GAK SIN
Life of this patent
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Abstract
A temperature control apparatus is provided. The temperature control apparatus includes an analog to digital (AD) converter digital-converting a measurement value transmitted from a plurality of temperature sensors; a control means comparing the measurement value transmitted from the AD converter with a preset desired value to perform PID calculation; and an output unit transmitting, to outside, a pulse width modulation (PWM) control signal transmitted form the control means, wherein an input-side isolator for isolation for each temperature sensor is provided between the AD converter and the temperature sensor, the input-side isolator is connected to each of the temperature sensors, and the control means sequentially operates the input-side isolators.
Claims20
A temperature control apparatus comprising:
- An analog to digital (AD) converter digital-converting a measurement value transmitted from a plurality of temperature sensors;
- a control means comparing the measurement value transmitted from the AD converter with a preset desired value to perform PID calculation;
- and
- an output unit transmitting, to outside, a pulse width modulation (PWM) control signal transmitted form the control means,
- wherein an input-side isolator for isolation for each temperature sensor is provided between the AD converter and the temperature sensor,
- the input-side isolator is connected to each of the temperature sensors, and
- the control means sequentially operates the input-side isolators.
A temperature control apparatus in which temperature sensors requiring a two-line connection are provided, wherein two lines connected to each temperature sensor form one channel and a first SSR and a second SSR are connected to each channel.
A temperature control method of controlling a temperature by using a temperature control apparatus in which each temperature sensor has each channel and an SSR enabling each channel to be selectively connected to an AD converter is provided, the temperature control method comprising:
- determining a type of the temperature sensor selectively connected to the AD converter,
- turning off operations of SSRs connected to each temperature sensor,
- selecting a resistor reference working as a reference when a temperature value measured by the temperature sensor is compensated for,
- selectively operating the SSRs to receive the temperature value sequentially from each temperature sensor,
- compensating for the received temperature value by using the selected resistor reference to calculate a compensated temperature, and
- performing PID calculation on the compensated temperature and generating a PWM control signal to be transmitted to an output unit.
Dependencies are inferred from the claim text.