Product overview

MZD1 and MZD3 series rectifier and voltage regulator modules adopt large-scale integrated circuit design, which integrates synchronous detection circuit, phase shift control circuit, trigger drive circuit, fully controlled bridge composed of one-way thyristor, RC resistance-capacitance absorption circuit and power supply circuit. Integrated, using square chip with small voltage drop and DCB ceramic copper-clad board welding, SMT chip technology, reducing power consumption, improving efficiency, conducive to power saving, and stable performance. Under the input control of manual or automatic adjustment, the module realizes the integration of the control circuit and the thyristor main circuit through the phase-shift trigger circuit, so that the module has the power regulation function of controlling weak current and strong current, and generates strong current that can change the conduction angle. The trigger pulse signal then controls the internal thyristors respectively to directly convert the alternating current into a pulsating DC voltage with infinitely adjustable amplitude. The voltage on the load is adjustable from 0V to the maximum grid voltage. Products are widely used in various power supplies, voltage stabilization, DC motors, excitations, welding, electroplating, charging and other occasions.

Product typical applications

Heating equipment: electric furnace, oven, heating equipment, injection molding equipment, textile equipment, drying system power supply distribution system Lighting equipment: stage lighting, hotel lighting, industrial lighting, public lighting Motor drive and speed regulation: fan motor, water pump motor, torque motor and others Industrial control: transformer primary side, inductor coil, electroplating, welding, etc.

Product performance characteristics

1. The input control terminal and the strong current main circuit are fully isolated, and the insulation medium is greater than 2000VAC. 2. The module uses high-quality and safe electronic components, SMT patch technology, high-power thyristor chips and low thermal resistance copper-ceramic bonding (DCB) base plate. , built-in synchronous transformer constitutes an integrated structure, epoxy resin potting, small size, stable performance, high reliability 3. It has linear compensation function, the output is a linear characteristic curve, the built-in RC resistance and capacitance absorbs little harmonic interference, and has anti-interference ability powerful. 4. The module is fully compatible with automatic input signals such as 0-5VDC, 1-5VDC, 0-10VDC, 2-10VDC, 0-10mA, 4-20mA, etc. It can also be manually controlled with a 2-10k/2w potentiometer, and has a wide adjustment range. , High output adjustment accuracy 5. It is designed with a green LED power indicator light and a red LED output adjustment amount indicator light to facilitate users to observe the working status. 6. The output voltage is stable and AC power can be directly converted into DC voltage with infinitely adjustable amplitude.

Model meaning

Technical parameters

Dimensional drawing and wiring diagram

Product packaging instructions

The internal circuit structure of MZD1 is four high-power thyristor chips with anti-parallel output and no void welding. The internal circuit structure of MZD3 is six high-power thyristor chips with anti-parallel output and no void welding. Low thermal resistance copper-ceramic bonding (DCB) base plate, good heat dissipation, stable performance and high reliability. The power supply voltage is 380VAC, and special voltages can be customized from the company.

Module selection and precautions

1. The selection of current specifications should take into account voltage fluctuations, current impact, ambient temperature, heat dissipation conditions and other factors, and leave room for selection. Resistive load: The nominal current of the module should be 3-4 times the rated current of the load. Inductive load: The nominal current of the module should be 5-6 times the rated current of the load.

2. The module cannot work at a small conduction angle for a long time, otherwise it will seriously heat up or burn out. Generally, the output voltage is adjusted above 1/2 of the input voltage.

3. To take over-voltage or over-current protection, you can connect diodes at the input and output ends or choose a 800V-900V piezoresistor for effective over-voltage protection. The main circuit is connected to a fuse or circuit breaker, and the value is 1.5 times the actual load.

4. Reasonably choose a radiator. A radiator must be installed for loads above 10A, and forced air cooling or water cooling for loads above 40A.

5. It is impossible to accurately adjust the speed of asynchronous motors. It is only suitable for torque motors, fans, water pump motors and other occasions that do not have high speed requirements. Speed ??regulation can be achieved through the voltage regulation module.

6. The COM terminal is the common negative pole of each functional terminal. Each functional terminal must be positive relative to the COM terminal. The positive and negative polarities of the input terminals must not be reversed, otherwise the output load terminal may be out of control (fully open or fully closed).

7. The control characteristics of each functional terminal are all positive characteristics, that is, the higher the control voltage, the higher the output voltage of the strong current main circuit.