MB1202-132

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MB1202-132 is a multi-function pulse-width modulation (PWM) control device with various features. It supports single-phase or three-phase execution, and can realize forced commutation of thyristor. It is widely used in a variety of motor speed regulation systems and synchronous self-excited adjustable load systems, for highly efficient AC motor control applications.

Application

MB1202-132 is widely used in power systems that require high precision, low power consumption, and high control accuracy. The device is suitable for adjustable frequency drive systems, stepless speed regulation systems, and low inertia AC servo control systems. Because of its simple circuit, reliable operation, and excellent performance, MB1202-132 is applied in multiple fields, such as:

• Steel and metallurgical production lines
• Textile and weaving production lines
• Real-time control systems
• Tube and plate production lines
• Woodworking and plastic machines
• Injection molding machines
• High frequency induction heating equipments
• Railway and ship control systems
• Ceramics and construction machines

Working Principle

The control principle of MB1202-132 is mainly based on the PWM control technology. It accurately controls the thyristor and IGBT for speed regulation. The constant voltage generated by the bridge rectifier is sent to the terminal of comparator 1 after being filtered and stabilized. Terminal 2 of the comparator is connected to a sawtooth wave. The PWM controller drives the constant frequency cycle PWM signal to the gate of the power switch according to the voltage input and the sawtooth wave, which controls the on and off time of the power switch on the gate.

At the same time, when the control voltage is greater than the set speed voltage on the voltage terminal, the output terminal of the comparator is low level. PWM controller uses this signal as a trigger to change the control polarity of the power switch. The higher the speed voltage is, the lower the on state time of power switch is, thus realizing the speed regulation.

Performance

MB1202-132 provides high control accuracy and short response time. Its PWM regulation range is wide, and can reach 0~30kHz. The power output frequency can be set to 0.5~32kHz, and the polarity of the power switch can be set arbitrarily. The device also supports current monitoring, has a built-in dead zone control circuit, and provides a selection of lock detection output. MB1202-132 has a wide operating temperature range (0~115℃). In addition, it has good vibration and shock resistance and consumes low power.

Conclusion

MB1202-132 is a very versatile device for controlling AC motors. It supports single-phase or three-phase execution, and can realize forced commutation of thyristor with high accuracy and short response time. The device is widely used in multiple fields, such as steel and metallurgical production lines, textile and weaving production lines, injection molding machines, and railway and ship control systems. Therefore, MB1202-132 is a very reliable and cost-effective solution for AC motor control applications.

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