Application and analysis of power regulator in pit type furnace
The pit type annealing furnace is an important process in the production of hydrogen storage alloy, which has great influence on the properties of the product. Hydrogen storage alloy products require better uniformity of furnace temperature for annealing and annealing under gas protection. Annealing furnace temperature control system principle is: the detected by thermocouple temperature in the furnace, the furnace temperature signals to temperature control table, temperature controller will set value compared with the current value in the furnace operation, then the output signal to the thyristor, by controlling thyristor trigger phase Angle to control the output voltage, so as to realize the temperature control of pit type annealing furnace.
The selection of temperature control element is very important for hydrogen storage alloy because of its high requirement for annealing. Through the comparison of many aspects, we choose Huate electric power regulator produced in Taiwan, China. The power regulator is an integral module, equipped with a fast fuse, radiator, fan, beautiful appearance, high control precision, widely used in industry in various equipment, such as pit type furnace, heat treatment furnace, high temperature furnace, etc.
1. Advantages of power regulator products
(1) The body is installed with a fast fuse, which can prevent short-circuit current from causing damage to the thyristor. Power regulator for open die forming, small volume, easy to install wiring.
(2) The output characteristic is linear and the temperature control precision is high. High quality, no interference. Multiple LED lights display, in case of any situation can immediately determine the cause of failure.
(3) The body is equipped with a cooling fan and a temperature measuring element is installed on the radiator. Once the temperature exceeds the thyristor service temperature, it will automatically stop to protect the thyristor components.
2. Performance and application of power regulator
The power regulator has two control modes, one is phase control and the other is zero control. In addition, according to the different load conditions, the selection of power regulator also has an impact. The power regulator can be applied to three load types: a constant impedance load, a transformer type load and a constant current control type load. The heating element of annealing furnace selects ferrochrome aluminum material, which has high heating temperature and small resistance change in the heating process, so the constant impedance type power regulator is selected and phase control is adopted. The power regulator is provided with two potentiometers on the circuit board, which can adjust the reference voltage output and output, so as to adjust the power output conveniently. It can also adopt the external potentiometer to adjust the output power, which is very convenient to use.
According to the power input, the power regulator can be divided into three phase and single phase. There are a variety of wiring modes to choose from, including manual and automatic control switching, and multiple power regulators (3 sets) can also be controlled by a single temperature control meter. Due to the high requirement of uniformity of annealing furnace temperature, 3 sections of temperature control are adopted, and 3 single phase electric power regulators are controlled through 3 temperature control meters to achieve the purpose of automatic control of furnace temperature.
On 2018-08-08 11:45:46
