Automobile fuel injection pump is an important part of automobile diesel engine. The fuel injection pump assembly is usually composed of fuel injection pump, governor and other components installed together to form a whole. Among them, the governor is to ensure the low speed operation of the diesel engine and to limit the speed, to ensure that the injection volume and speed to maintain a certain relationship between the components. The fuel injection pump is the most important part of diesel engine, which is regarded as the "heart" part of diesel engine.

The test bench of fuel injection pump in dongming automobile repair plant was inspected, and it was found that the bench was mainly composed of asynchronous motor drive device, fuel oil circuit and frequency conversion regulating device, fuel injection storage and measurement device and computer measurement and control device.

As a core component, frequency converter also has high requirements. Main indicators:

1, low frequency torque, load can not be turned.

2. High control accuracy. In the work speed should not have a little fluctuation, should be very. 3. Strong anti-interference, anti-vibration, low voltage, etc.

According to the working conditions, we choose AMB300 inverter for optimization. Ambition tailor-made a product for the characteristics of the test bench, no matter in the software or hardware have been modified. First of all, the factory parameters have been set according to the performance requirements of the test bench, and the manufacturer only needs to use the wiring. Secondly, in terms of vibration, we heat baffle plate design, heat dissipation, anti-shock effect are very good. And delta and other foreign brands using plastic board in the long-term shock process is easy to break.

In low voltage, as a result of the experiment using site general in remote mountainous area and suburbs, voltage is very low, amb company aiming at this problem, the hardware and software to overcome above also can work normally under 300 v, we adopt the 450 v capacitor, general inverter is 400 v, 11 kw die fast we use the 75 a, general inverter manufacturer USES 40 a. In the software, the function of current limiting operation is adopted to solve the problem of low voltage.

AMB300 inverter introduction:

Advantages:

Control mode open loop vector control (SVC), V/F control, open loop torque control, closed loop vector control

Starting torque 0.5hz /150%

Speed regulation range 1:100 (SVC)

Steady speed accuracy ±0.5% (SVC)

Overload capacity 150% rated current 60s; 200% rated current 1s.

Automatic torque increase under VF control; Manual torque increased by 0.1% ~ 30.0%

Motor parameters rotation static self-learning

According to the load condition, automatically optimize V/F curve to realize energy-saving operation

1) frequency conversion control is adopted, which is easy to operate and does not need to manually adjust the inlet water valve, greatly reducing the labor intensity of workers and improving work efficiency.

2) low starting noise. In the process of starting, the motor slowly accelerates from low frequency to the set frequency. The small starting current reduces the impact on the power grid, protects the electrical equipment, prolongs the service life of the motor, improves the efficiency of the motor, and saves the maintenance cost.

3) the pressure transmitter feedback current signal (4-20ma) to the inverter central processing unit (CPU) is used to form a closed-loop control system through PID control. The output frequency is controlled by the action processor, making the motor speed increase or decrease automatically. This not only reduces the reactive power of the motor, but also improves the efficiency of the water pump and saves energy.

4) frequency conversion is adopted to meet the needs of production, which not only saves electric energy, but also reduces the maintenance amount of valve. It also improves the automation level of the system, reduces the noise of the system, improves the working environment and reduces the labor intensity of the workers. Using frequency conversion to get the actual water flow, not only save the electric energy, improve the degree of automation of the system; The frequency converter automatically adjusts the speed according to the demand, and is smooth and stable, reducing the labor intensity of the personnel; The operating parameters of the water pump are improved and the system efficiency is greatly improved.

　　AMB300 vector inverter has been in shandong, a number of automotive oil pump test bench professional manufacturers supporting the use, especially the domestic manufacturers of nantai company exported to the world. The stability of its speed regulation performance and the reliability of product quality are widely recognized by all customers.