The frequency signal and operation signal of the inverter are key to ensuring normal equipment operation. Generally speaking, only when these two conditions are met can we use the inverter more effectively. So, where does the inverter's frequency signal come from? Below, Changsha Sunye Electric Co., Ltd. will briefly introduce several methods for obtaining frequency signals, hoping to be helpful to you.

1. Keypad Panel Setting

The keypad panel setting is the simplest method of frequency input for inverters. Users can directly adjust the set frequency using the potentiometer, numeric keys, or up/down buttons on the inverter's control panel.

The biggest advantage of this method is its simplicity and convenience, along with monitoring capabilities. It allows real-time display of current, voltage, speed, and other parameters during inverter operation.

2. External Potentiometer Setting

This method adjusts the inverter frequency by using an external potentiometer connected to the inverter.

3. Multi-function Input Terminal Setting

By using the multi-function input terminals of the inverter, the set frequency can be adjusted. These terminals can be externally connected to buttons, PLC outputs, or relay contacts.

4. Analog Signal Input

This method involves providing a frequency command via the inverter’s analog input terminal using an external analog signal. The output frequency of the inverter can be changed by adjusting the magnitude of the analog signal. This can be achieved through an RS485 interface or via a PLC.

Above are the methods introduced by Changsha Sunye Electric Co., Ltd. regarding how water pump inverters obtain frequency signals. Additionally, the purpose of using inverters is to change the motor speed by adjusting the output frequency. Therefore, understanding the signal sources as described above will help users better utilize inverter equipment.

Changsha Sunye Electric Co., Ltd. (established in 2010) and Shenzhen Sunye Electric Co., Ltd. (established in 2002) are national high-tech enterprises integrating R&D, manufacturing, and sales of inverters, industry-specific all-in-one machines, servo drives, and new energy products.

Sunye Electric owns independent intellectual property rights. Its products have passed inspections and certifications by national authoritative institutions and have obtained multiple software copyrights and IP certificates. The company invests heavily every year in researching new technologies and developing new products, with many patents and software copyrights granted. Core platform technologies include construction hoist drivers, high-performance vector inverters, servos, and permanent magnet synchronous motor controls. Low- and medium-voltage inverters and servo drives are widely used in industries such as lifting equipment, stone processing, HVAC, machine tools, metal products, wire and cable, plastics, printing and packaging, textile and chemical fibers, building materials, metallurgy, coal mining, municipal services, and automotive applications. Guided by the philosophy of "innovation, technology, and strength," and driven by the corporate spirit of "unity, progress, pragmatism, and innovation," the company adheres to the business principle of "honesty and excellence, mutual benefit and coexistence." With a quality policy of "implementing total quality management and continuous improvement to pursue zero defects," Sunye Electric is committed to providing premium products to customers across various industries.

Address: Sunye Electric Industrial Park, No. 669 Xinsheng Road, High-Tech Zone, Changsha City

Tel/Fax: 0731-89932666 0731-89932688

Business Phone: 400-0755-731

Technical Support: 400-0755-731