Special high-voltage driving power source for intelligent piezoelectric valve positioner

Abstract

The invention discloses a special high-voltage driving power source for an intelligent piezoelectric valve positioner. The special high-voltage driving power source comprises an input filter circuit, an IC1 boosted circuit, an overvoltage protection circuit, an output voltage regulator circuit, a high-frequency boosted circuit and a rectification filter circuit. The input filter circuit is composed of an electrolytic capacitor C1. The IC1 boosted circuit is composed of a soft starting capacitor C3, a bootstrap capacitor C2, a bootstrap resistor R2 and an IC1 integrated device. The high-frequency boosted circuit is composed of a high-frequency transformer T1. The rectification filter circuit is composed of a rectification diode D1, a high-frequency filter capacitor C4 and an electrolytic capacitor C5. The special high-voltage driving power source has the advantages of being simple in circuit structure, small in number of peripheral devices, high in efficiency, and capable of directly driving the piezoelectric valve positioner.

Description

technical field [0001] The invention belongs to the field of power electronics technology and power supply technology, and in particular relates to a high-voltage special power supply for a piezoelectric intelligent valve positioner. Background technique [0002] Pneumatic regulating valve is one of industrial process control instruments, widely used in chemical industry, electric power, metallurgy, pharmaceutical and other industries. As the core component of the pneumatic control valve, the valve positioner plays a decisive role in the control of the pneumatic control valve. The piezoelectric valve positioner is a new type of positioner that has emerged in recent years. It uses piezoelectric valves to realize the electrical conversion function. The power consumption is extremely low during operation, and both the air inlet and the exhaust port are closed in a stable state. , the air consumption is almost zero, the energy saving effect is obvious, and its application is be...

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Problems solved by technology

A single chip is widely used, commonly used in a wide range of input voltage is 4.5V ~ 55V, the output voltage is adjustable 0.8V ~ 45V, the maximum output current is continuous 3A, with 100KHz operating frequency and strong electromagnetic compatibility It is widely used in low-voltage fields such as mobile phones and car chargers, but for piezoelectric actuators, there is no dedicated DC drive power supply with high conversion efficiency, small size, and high voltage conversion ratio.

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