KR20070116411A - Power supply system for temperature control - Google Patents

Abstract

A power supply system for temperature control is provided to enhance heat efficiency and to reduce production cost of the power supply system by controlling temperature according to temperature/resistance characteristic of a heating body unit. A power supply system for temperature control includes a power source unit(100), a control unit(200), an output unit(400), and a microprocessing unit(300). The power source unit converts an AC voltage into a middle DC voltage. The control unit converts the middle DC voltage into the AC voltage. The output unit includes a current sensor(410) to detect the size of current by receiving the DC voltage and a heating body unit(420) of which voltage is changed according to the size of current outputted from the control unit. The microprocessing unit calculates the temperature of the heating body according to the current and the voltage of the heating body unit and compares the temperature of the heating body unit and target temperature to output a control signal for controlling the size of the current and voltage to the control unit.

Description

Power Supply System for Temperature Control

1 shows a conventional power supply system for controlling the temperature of a load.

2 is for explaining the structure of a power supply system according to an embodiment of the present invention.

3 is a view for explaining an example of the resistance and temperature characteristics of the heating element.

4 is for explaining the power supply system structure according to an embodiment of the present invention in detail.

5a and 5b are for explaining the adjusted voltage, current, power according to the temperature control of the power supply system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: power supply unit 200: control unit

300: microprocessor unit 400: output unit

410: current sensor 420: heating element

The present invention relates to a power supply system for temperature control including a power supply device.

In general, the voltage coming on a power line has an alternating voltage. These AC voltages must be converted to DC voltages according to the system in which each load is formed. In particular, the converted DC voltage should have various sizes depending on the parts and functions of each system. For this purpose, a power supply is needed.

Such a power supply device converts an external AC voltage into a DC voltage to generate a DC voltage having various sizes depending on parts of the system in which a load is formed and possibly.

Herein, when the power supply device supplies a voltage for a long time or supplies voltages of various sizes to a load, the load rises to generate temperature, thereby generating heat. This heat generation causes an overvoltage in the power supply or even lowers the thermal efficiency of the load. In order to overcome this, a conventional temperature sensor and a temperature controller are used. Looking at a conventional power supply system including such a temperature sensor and a thermostat as follows.

1 is a view showing a conventional power supply system for controlling the temperature of the load.

Referring to FIG. 1, the conventional power supply system includes a thermometer power supply 10, a TIC temperature control unit 20, a temperature sensor 30, an electric furnace 40, a power supply device 50, and a load power supply 60. It consists of. The load power source 60 supplies power to the power supply device 50 and the heat source 40-1 of the electric furnace 40, and the temperature sensor 30 controls the temperature control object 40-of the electric furnace 40. 2) sense the temperature. The TIC temperature controller 20 converts the measured value of the temperature sensor 30 to a temperature and receives power from the thermometer power source 10. Temperature Indicating Controller (TIC) temperature controller 20 generates a 4 to 20 mA control current according to a value corresponding to the measured temperature and applies it to power supply device 50. The temperature control object 40-2 of the electric furnace 40 is an object that is heat treated by the heat emitted from the heat source 40-1. The temperature controller 20 generates a control current by measuring the temperature of the heat source 40-1, and controls the magnitude of the current output from the power supply device 50 according to the control current to control the temperature of the heat source 40-1. Is controlled.

Such a conventional power supply system is difficult to precise temperature control because the control current changes according to the position of the temperature sensor 30. For example, when the distance between the temperature control object 40-2 or the heat source 40-1 and the temperature sensor 30 that is the target of the heat treatment is changed, the temperature control object 40-2 or the heat source 40-1. Even if the temperature is the same, since the magnitude of the control current output by the temperature sensor 30 is different, precise temperature control is difficult.

In addition, in the conventional power supply system, since the temperature control object 40-2 and the heat source 40-1 are separated by a predetermined distance, the temperature of the temperature control object 40-2 by the heat emitted from the heat source 40-1. Since it takes time to change to the desired temperature, a problem occurs that the time taken for the temperature sensor 30 to sense the temperature becomes long.

In addition, since the temperature control object 40-2 and the heat source 40-1 are separated by a predetermined distance, some of the heat emitted by the heat source 40-1 is lost and thus the temperature of the temperature control object 40-2 is lost. In order to change the temperature to the desired temperature, a lot of energy is required, and thus a problem arises that the thermal efficiency of the power supply system becomes worse.

In addition, since the conventional power supply system includes a TIC temperature controller 20 and a temperature sensor 30, a problem arises in that the manufacturing cost of the power supply system is increased.

In order to solve the above problems, the present invention is to provide a power supply system capable of precisely controlling the temperature.

The present invention is to provide a power supply system capable of controlling the temperature at high speed.

The present invention is to provide a power supply system that can improve the thermal efficiency.

The present invention is to provide a power supply system that can reduce the manufacturing cost.

The temperature control power supply system of the present invention includes a power supply unit for converting an AC voltage into an intermediate DC voltage, a controller for converting an intermediate DC voltage to a DC voltage, a current sensor for detecting the magnitude of the current by receiving the DC voltage, and an output current from the controller. The control unit converts a control signal for controlling the magnitude of the current and the voltage by calculating the temperature of the heating element according to the current and voltage of the output unit and the heating element including the heating element portion whose voltage is changed according to the size of the heating element. And a microprocessor unit for outputting.

The current sensor is characterized in that it comprises a shunt (SHUNT).

And a third filter unit between the control unit and the output unit.

The power supply unit receives an alternating current voltage, a wiring breaker for blocking current when overloaded, a first filter unit for removing noise of the AC voltage output from the wiring breaker, and a rectifier for converting the AC voltage from which the noise is removed to an intermediate DC voltage. Characterized in that it comprises a.

The intermediate DC voltage output from the rectifier is characterized in that the 250V or more and 320V or less.

The control unit converts an intermediate DC voltage into a first intermediate AC voltage, a transformer for outputting a second intermediate AC voltage having a magnitude smaller than that of the first intermediate AC voltage, and a second intermediate AC voltage to DC voltage. 2nd rectifier

Characterized in that it comprises a.

And a second filter unit between the power supply rectifier and the inverter unit of the control unit.

The inverter unit is characterized in that it comprises an insulated gate type bipolar transistor.

The heating element is characterized in that it comprises any one of a metal conductor, an alloy of the metal conductor, a semiconductor heating element, a ceramic heating element.

The metal conductor is one of molybdenum (Mo), platinum (Pt), nickel (Ni), chromium (Cr), tintalum (Ta), tungsten (W), copper (Cu), aluminum (Al) and iron (Fe) It is characterized by including the above.

The alloy of the metal conductor is characterized in that it comprises any one or more of stainless steel, nichrome (NiCr), iron chromium (FeCr), titanium aluminum (TiAl), nife (NiFe), iron chromium (FeCrNi).

The semiconductor and the ceramic heating element are characterized by including any one or more of SiC, TiC, AIC, TiN.

Power supply system for temperature control according to an embodiment of the present invention is a power supply for converting an AC voltage into a DC voltage, a heating element portion whose voltage is changed according to the magnitude of the current output from the power supply device, and the temperature / resistance characteristics of the heating element portion The microprocessor unit may automatically calculate a temperature of the heat generator unit to control the temperature of the heat generator unit.

The microprocessor unit may include a memory unit that stores data corresponding to temperature / resistance characteristics.

The microprocessor unit controls the temperature of the heating element unit by comparing the temperature with the target temperature.

Hereinafter, a power supply system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view for explaining the structure of a power supply system according to an embodiment of the present invention.

2, a power supply system according to an embodiment of the present invention includes a power supply unit 100, a control unit 200, a microprocessor unit 300, and an output unit 400. The output unit 400 includes a current sensor 410 and the heating element 420.

The power supply unit 100 receives an AC voltage from the outside, converts the intermediate DC voltage DC, and outputs the converted DC voltage.

The controller 200 controls the voltage and the current to convert the intermediate DC voltage into the DC voltage. The DC voltage output from the control unit 200 is sent to the current sensor 410 of the output unit 400 and the heat generating unit 420 of the output unit 400. Here, the power supply unit 100 and the control unit 200 is a power supply device.

The current sensor 410 of the output unit 400 receives a DC voltage and detects the magnitude of the current and the voltage, and sends a control signal to the microprocessor unit 300. In addition, the current sensor 410 is connected in series with the heating element 420 to be described later. Therefore, the magnitude of the current and voltage input from the heating element unit 420 is detected and the control signal is sent to the microprocessor unit 300. Here, the current sensor 410 may include a shunt SHUNT.

The heating element 420 of the output unit 400 is a load, and the load is an object for controlling the temperature. For example, if the power supply system according to the embodiment of the present invention is used to supply power for heat treatment, the heating element 420 may be an object to be heat treated.

The heating element 420 may vary in resistance and temperature according to resistance / temperature characteristics of the heating element 420 itself according to the magnitude of the current output from the controller 200. For example, when the magnitude of the current flowing in the heating element 420 increases, the resistance of the heating element 420 increases and thus the temperature increases. The current sensor 410 senses the voltage and current of the heating element 420.

The microprocessor unit 300 is electrically connected to the power supply unit 100, the control unit 200, and the output unit 400 to exchange control signals. Therefore, the microprocessor unit 300 calculates the magnitudes of voltages and currents of the control unit 200 and the heating element unit 420 through the current sensor 410. Accordingly, the microprocessor unit 300 calculates the resistance of the heating element 420. The microprocessor unit 300 previously stores data on resistance and temperature characteristics of the heating element 420 in a memory unit (not shown). Based on this, the microprocessor unit 300 calculates the temperature of the heating element 420 and compares the temperature of the heating element 420 with a preset target temperature to control the control signal for controlling the magnitude of the current and voltage. Send to). That is, the microprocessor unit 300 may quickly control the temperature of the heating element 420 according to the resistance and temperature characteristics of the heating element 420.

Accordingly, the power supply system according to the present invention can control the temperature of the heating element 420 even if there is no TIC temperature controller and a temperature sensor unlike the prior art. That is, the conventional power supply system shown in FIG. 1 has various problems because the heat source 40-1 and the temperature control object 40-2 are separated, but in the power supply system according to the embodiment of the present invention. Since the heat generating unit 420 is directly supplied with power from the control unit 400 and the micro processor unit 300 controls the temperature change of the heat generating unit 420, precision temperature control, high speed temperature control, thermal efficiency improvement, and manufacturing cost Savings can be achieved.

In addition, the microprocessor unit 300 may send and receive various control signals to the power supply unit, the control unit, and the output unit, for example, to control information such as alarms, alarms, and temperatures.

The microprocessor unit 300 compares the temperature of the heating element unit 420 with a preset target temperature, and sends a control signal for controlling current and voltage for converging the temperature of the heating element unit 420 to the target temperature to the controller 200. The control unit 200 generates a voltage and a current corresponding to the control signal for current and voltage regulation, and supplies the generated voltage and current to the heating element unit 420. As a result, the temperature of the heating element 420 converges to the target temperature.

Here, the temperature and the resistance characteristics of the heating element 420 will be described in detail.

3 is a view for explaining an example of the resistance and temperature characteristics of the heating element.

The heating element may include any one of a metal conductor, an alloy of the metal conductor, a semiconductor heating element, and a ceramic heating element. For example, metal conductors may include molybdenum (Mo), platinum (Pt), nickel (Ni), chromium (Cr), tintalum (Ta), tungsten (W), copper (Cu), aluminum (Al), and iron ( Fe) may be included. In addition, the alloy of the metal conductor may include any one or more of, for example, nichrome (NiCr), iron chromium (FeCr), titanium aluminum (TiAl), nife (NiFe), iron chromium (FeCrNi). The semiconductor and ceramic heating element may include at least one of SiC, TiC, AIC, and TiN.

When a current flows in the heating element, the temperature changes according to the electrical resistance. The temperature and resistance characteristics of the heating element are shown in the graph of FIG. 3. For example, when nichrome (NiCr) is changed from 130 [dl / cm] to 140 [dl / cm], the temperature has a characteristic of rising to 1200 占 폚. When iron chromium (FeCr) varies from approximately 110 [dl / cm] to 110 [dl / cm], the temperature rises to 1000 占 폚. MoSi2 rises to 2200 ° C when it changes from 10 [mm / cm] to 120 [mm / cm]. The remaining platinum (Pt), tungsten (W), molybdenum (Mo), and tintalum (Ta) also rapidly change resistance and temperature similarly to MoSi2.

As such, metal conductors, alloys of metal conductors, semiconductors, and ceramics have inherent resistance / temperature characteristics, and are sensitive to changes in resistance and temperature, thereby enabling high temperature control of the heating element.

On the other hand, look at the structure of the power supply system described above in more detail as follows.

4 is a view for explaining the structure of the power supply system according to an embodiment of the present invention in detail. Referring to Figure 4, the temperature control power supply system according to an embodiment of the present invention includes a power supply unit, a control unit and an output unit. The power supply unit includes a circuit breaker 110, a first filter unit 120, and a rectifier 130. In addition, the control unit includes an inverter unit 210, a transformer 220, and a second rectifying unit 230. The output unit includes a current sensor 410 and the heating element 420.

The circuit breaker 110 for input has an AC voltage input of 220 V and a frequency of 60 HZ. The circuit breaker 110 prevents an overload and a short from being generated from the AC voltage AC. In other words, the wiring breaker 210 automatically cuts off the current in the event of overload, in order to protect internal circuits. Here, the circuit breaker 110 is connected to one end of the AC voltage, and the other end thereof is connected to one end of the first filter unit 120.

The first filter unit 120 removes noise included in the output AC voltage AC of the circuit breaker 110. The other end of the first filter unit 120 is connected to one end of the rectifier 130.

The rectifier 130 converts the AC voltage AC output from the first filter unit 120 into an intermediate DC voltage. The rectifier 130 may use a half-wave rectifier circuit, a full-wave rectifier circuit, a bridge rectifier circuit for this conversion, but preferably a bridge rectifier circuit. The bridge rectifier circuit may convert an AC voltage into an intermediate DC voltage. At this time, the intermediate DC voltage output to the rectifier 130 has a voltage of 250V or more and 320V or less.

The reason why the AC voltage input from the outside is converted into a high intermediate DC voltage (250V to 320V) is to rectify the primary to prevent the malfunction of the power supply device.

As such, the power supply unit receives an AC voltage input from the outside through the circuit breaker 110, the first filter unit 120, and the rectifier 130, and converts the AC voltage into an intermediate DC voltage. It can be seen that the primary conversion is to obtain a voltage.

On the other hand, the power supply unit may be connected to the inverter unit 210, it is preferable to further include a second filter unit 240 between the power supply unit and the inverter unit 210 before connecting to each other.

That is, the other end of the rectifier 130 of the power supply unit is connected to one end of the second filter unit 240. Here, the reason for further forming the second filter unit 240 is because the output voltage of the power supply unit is a high intermediate DC voltage, so that ripple and noise are generated, so as to remove this and supply high-quality power to the load.

The other end of the second filter unit 240 is connected to one end of the inverter unit 210. The inverter unit 210 converts the intermediate DC voltage into a first intermediate AC voltage, for example, an AC voltage of 260V. In this case, the inverter unit 210 converts the intermediate DC voltage into the first intermediate AC voltage because the intermediate DC voltage does not have a frequency and converts it back into the first intermediate AC voltage, which is an AC voltage, to obtain a frequency.

To this end, the inverter unit 210 preferably includes an insulated gate bipolar transistor (IGBT). Such an insulated gate bipolar transistor (IGBT) can perform high-speed switching, and can obtain a first intermediate alternating voltage having a frequency required for the power supply, for example, a high frequency of 20 KHZ. The other end of the inverter unit 210 is connected to one end of a transformer (Transformer, 220).

Transformer 220 converts to a second intermediate alternating voltage having a magnitude smaller than that of the first intermediate alternating voltage. For example, the first intermediate AC voltage 260V is converted into the second intermediate AC voltage 15V. At this time, the transformer 220 is a high-frequency transformer, it is preferable to use a material of a ferrite core (Converter Core) in order to convert a high first intermediate AC voltage to a low second intermediate AC voltage. Perlite cores are useful for high frequencies and can achieve high efficiency.

Here, the reason why the transformer 220 converts the second intermediate AC voltage into a low voltage is suitable for the characteristics of the heating element 400. The other end of the transformer 220 is connected to the second rectifier 230.

The second rectifier 230 converts the second intermediate AC voltage into a DC voltage DC. For example, the second intermediate AC voltage 15V is converted into a DC voltage 15V. As described above, the reason why the second rectifying unit 230 converts the second intermediate AC voltage into the DC voltage DC is because all of the electronic products, the semiconductor equipment, and the heat treatment apparatus use the DC voltage.

The second rectifier 230 is connected to the current sensor 410, and preferably further includes a third filter unit 250 between the second rectifier 230 and the current sensor 410. Therefore, the other end of the second rectifying part 230 is connected to one end of the third filter part 250. The third filter unit 250 removes ripple and noise generated from the DC voltage DC. The other end of the third filter unit 250 is connected to one end of the current sensor 410. In addition, the other end of the third filter part 250 is connected to the heating element part 420.

The current sensor 410 includes a shunt SHUNT for measuring current. The current sensor 410 is a sensor that measures the voltage and current input through the third filter unit 250. The other end of the current sensor 300 is connected to the heating element 420.

Since the heating element 420 is a metal conductor or ceramic, the temperature rises rapidly according to the voltage and current supplied from the control unit. Here, since the heating element 420 and the current sensor 410 have been described above with reference to FIG. 2, description thereof will be omitted.

The microprocessor unit 300 compares the temperature of the heating element 420 with a preset target temperature and calculates the magnitude of the voltage and current for the temperature of the heating element 420 to become the target temperature. At this time, the microprocessor unit 300 uses the data of the resistance / temperature characteristics of the heating element stored in the memory in order to calculate the temperature of the heating element 420. Thereafter, the microprocessor unit 300 transmits a control signal according to voltage and current magnitudes, for example, a PID (proportional integral derivative) control signal to the inverter unit 210 of the controller.

In addition, the microprocessor unit 300 performs a program operation for controlling voltage, current, temperature, and the like, and generates a control signal for an alarm or an alarm. Therefore, the microprocessor unit 300 exchanges control signals with components of the power supply unit, the control unit, and the output unit.

As described above, the temperature control power supply system according to the embodiment of the present invention converts the AC voltage AC to the DC voltage DC to control the temperature generated by the microprocessor unit heat generating unit.

In particular, the power supply system for temperature control according to the embodiment of the present invention can control the temperature at high speed by using the characteristics of the heating element which reacts quickly to temperature. Here, the method of calculating the voltage, the current, and the power adjusted in the target temperature range of the current and the voltage generated by the microprocessor unit will be described in detail with reference to FIGS. 5A and 5B.

5A and 5B are graphs for explaining adjusted voltage, current, and power according to temperature control of a power supply system according to an exemplary embodiment of the present invention.

Here, the heating element to be described in the graphs of FIGS. 5A and 5B describe one example of the stainless steel in the metal conductor, and the time, the target temperature, and the numerical values shown in the drawings are only one example for explaining the concept.

First, referring to FIG. 5A, the left and right sides of the graph are time axes, and the upper and lower sides are temperature axes. At this time, the temperature curve is a curve showing the temperature when the heating element portion is more than 20 ℃ 120 ℃. Here, 120 ° C is a target temperature that can be preset.

The current curve assumes that the temperature of the heating element increases when the current output through the controller is 1500A. Therefore, the microprocessor unit sets the target temperature to control the rising temperature of the heating element unit. That is, when the heating element portion is increased from 20 ° C to 120 ° C, 120 ° C is set as the target temperature. Here, when the heating element portion is increased to 120 ° C., the time is 0.8 seconds, and when it is increased to 100 ° C., the time is 0.5 seconds. Therefore, when the microprocessor wants to control the temperature at 120 ° C., the microprocessor may obtain the voltage, the current, and the power according to the temperature control.

Here, looking at the physical properties of the stainless steel to be described as an example, the intrinsic electrical resistance is 720 [NΩ-m], specific gravity is 8s, g, temperature coefficient is 0.001 [% / ℃], specific heat is 0.12 [cal / g]. Further, the stainless steel has a thickness of 136 [g] when the thickness is 0.2 mm, the width is 170 mm, and the length is 500 mm. Here, the equation for obtaining the resistance is as follows.

R ₁ = R ₀ [1+ α (t ₁ -t ₀ )]

R1 is the electrical resistance of the stainless at 120 ° C. R ₀ is the electrical resistance of the stainless steel at 20 ° C. At this time, since the electrical resistance is an intrinsic electrical resistance of the heating element, R ₀ is 720 [NΩ-m] = 0.01 [Ω]. t ₀ is 20 ° C and t ₁ is 120 ° C. α is the temperature coefficient of stainless steel and is 0.001 [% / ° C.].

Therefore, in Equation 1, R ₁ = 0.01 [1 + (0.001 x 100] = 0.011 [Ω].

Referring to the graph of FIG. 5B, when the stainless steel, which is the heating element, has a resistance of 0.01 [Ω] at 20 ° C. and a stainless steel of 120 ° C., the resistance increases to 0.011 [Ω]. You can find the actual temperature proportional to this resistance. Therefore, the microprocessor unit controls the voltage and the current by setting the target temperature.

Here, in order to obtain the voltage and current to be adjusted, first, the required amount of heat and power of the heating element is calculated using the following equation.

h = G × ΔT × Y

h is the required heat capacity, G is the weight, ΔT is the temperature difference and Y is the specific heat. In order to convert the required heat capacity into the required power, Equation 3 below is used.

Pw [KW] = h × 2 (△ T) / C / 1000

Pw is power requirements, and C is a conversion factor.

Therefore, when the target temperature is 120 ° C, the required calorific value h is 136 [g] × 100 ° C (= 120 ° C-20 ° C) x 0.12 [cal / g] = 1,632 [cal] by equation (2). . Further, according to equation (3), the required power Pw = 1,632 [cal] × 2 (0.5 [sec]) / 0.24 [w / cal] / 1000 = 13.6 [KW]. At this time, in order to obtain the amount of heat to supply the power supply system according to an embodiment of the present invention is 1.5 times the power required. This magnification is preset and can vary. As a result, the power capacity is 13.6 [KW] × 1.5 times = 20.4 [KW].

Here, the following equation is used to calculate the current.

P = I ² RI ² = P / R

V = IR

R is the value of R ₀ described above. That is, R = 0.01 [Ω].

Therefore, according to equation (4), I = 1,428 [A], approximately 1,500 [A]. In addition, according to equation (5), V = 1,500 [A] × 0.1 [Ω] = 15 [V].

Accordingly, when the target temperature of the heating element rises from 20 ° C. to 120 ° C., the heating element reacts quickly in 0.5 seconds to obtain the adjusted voltage, current, and power. Current and power can be calculated. The control signal for the adjusted voltage, current, and power values is sent to the inverter unit of the controller. Therefore, the power supply unit and the control unit can supply a voltage of 15 [V], a current of 1500 [A], and a power of 20.4 [KW] to the load.

In addition, as shown in the graph, when the temperature of the heating element rises from 20 ° C to 120 ° C is 0.8 seconds, using the above equations, it has approximately 100 [A].

As described above, the temperature control power supply system according to the present invention can control the temperature at high speed due to the heating element.

As described above, the power supply device according to the embodiment of the present invention is applicable to various products or semiconductor equipment required for temperature control as well as heat treatment.

As described above, the technical configuration of the present invention described above will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

The power supply system of the present invention can control the temperature of the heating element at high speed according to the temperature / resistance characteristics of the heating element.

Since the power supply system of the present invention controls the temperature according to the temperature / resistance characteristics of the heating element, it is possible to accurately control the temperature.

The power supply system of the present invention can control the temperature according to the temperature / resistance characteristics of the heating element portion can increase the thermal efficiency.

Since the power supply system of the present invention controls the temperature according to the temperature / resistance characteristics of the heating element, it is possible to lower the manufacturing cost of the power supply system.

Claims (10)

A power supply unit converting the AC voltage into an intermediate DC voltage; A control unit for converting the intermediate DC voltage into a DC voltage; An output unit including a current sensor configured to receive the DC voltage and detect a magnitude of a current, and a heat generator part whose voltage changes according to the magnitude of the current output from the controller; And  The microprocessor unit calculates the temperature of the heating element according to the current and the voltage of the heating element unit, and compares the temperature and the target temperature of the heating element unit to output a control signal for controlling the magnitude of the current and the voltage to the controller. Temperature control power supply system comprising a. The method of claim 1, The current sensor includes a shunt (SHUNT) characterized in that the power supply system for temperature control. The method of claim 1, And a third filter unit between the control unit and the output unit. The method of claim 1, The power supply unit A circuit breaker for blocking current when the AC voltage is input, a first filter unit for removing noise of the AC voltage output from the circuit breaker, and the AC voltage from which the noise is removed as the intermediate DC voltage A power supply system for temperature control comprising a rectifier for converting. The method of claim 1, The control unit An inverter unit converting the intermediate DC voltage into a first intermediate AC voltage; A transformer for outputting a second intermediate alternating voltage having a magnitude smaller than that of the first intermediate alternating voltage; And A second rectifier for converting the second intermediate AC voltage to the DC voltage Power supply system for temperature control, comprising a. The method according to claim 4 or 5, And a second filter part between the rectifier of the power supply part and the inverter part of the control part. The method of claim 1, The heating element is a power supply system for temperature control, characterized in that any one of a metal conductor, an alloy of a metal conductor, a semiconductor heating element, a ceramic heating element. A power supply for converting an AC voltage into a DC voltage; A heating element unit whose voltage is changed according to the magnitude of the current output from the power supply device; And a microprocessor unit which automatically calculates a temperature of the heat generator unit according to a temperature / resistance characteristic of the heat generator unit and controls the temperature of the heat generator unit. The method of claim 8, The microprocessor unit comprises a memory unit for storing data corresponding to the temperature / resistance characteristics. The method of claim 8, And the microprocessor unit controls the temperature of the heating element unit by comparing the temperature with a target temperature.

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