When designing a hybrid power system, there are three structures to choose from: series, parallel and series.
In the series structure, there is no mechanical energy transfer between the engine and the wheels. The series-parallel structure retains the traditional mechanical transmission structure and increases the torque of the engine by using the motor. Parallel system provides a redundant operation mode that series system does not have.
The hybrid power system designed by Zheng Song is a series-parallel structure. This structure can recover braking energy and store it in the accumulator. The motor can be driven at the same time as the engine to improve the dynamic performance of the car; The engine can run in the most efficient range at a specific speed, or it can adopt pure electric drive mode. The hybrid power system is highly integrated and easy to install. The integrated functions of motor drive/power generation, mixed mode control and electric quantity control are realized, and the engine runs at idle speed for 60% of the time, greatly reducing the exhaust emission.
trait
The motor adopts AC motor, which is mature, reliable, maintenance-free and low in price;
The engine adopts low-displacement EFI diesel engine, which has good fuel economy;
The generator adopts permanent magnet three-phase generator with high efficiency and light weight;
The perfect power battery management system improves the system reliability and prolongs the battery life.
The optimized control strategy can not only ensure the power and ride comfort of the whole vehicle, but also improve fuel economy and reduce emissions.
2). Permanent magnet synchronous motor controller series
Zheng Song CSM series permanent magnet synchronous motor controller is specially designed for the power system of electric vehicles and hybrid electric vehicles. The controller adopts advanced magnetic field oriented vector control technology and direct current negative feedback compensation field weakening control technology to realize smooth control of permanent magnet synchronous motor with wide speed regulation range and large torque output. The position sensor allows reliable resolver input, which fully meets the reliable work of electric vehicles in harsh use environment. Multi-channel automobile instrument interface and control I/O can fully meet the monitoring and operation of electric vehicles, eliminating the expensive on-board controller system. The built-in precharge function does not require the user to connect the precharge resistor to the main contactor, which further improves the reliability of the system.
trait
Advanced field-oriented vector control (FOC) combined with Zheng Song's unique optimization algorithm enables electric vehicles to achieve maximum torque output and optimal efficiency in the whole operating range, further reducing harmonic components and torque fluctuation of PMSM system, which is more suitable for HEV and EV systems.
The advanced flux weakening algorithm further expands the speed range of traditional PMSM, meets the needs of special working conditions of electric vehicles, and further exerts the advantages of PMSM;
The optimized peripheral interface is more in line with the control safety requirements of electric vehicles and the habits of drivers;
The enhanced rapid response protection mechanism can monitor any fault of the system in real time, and handle and display it in time, making the vehicle safer and the system more reliable;
Built-in pre-charging function, users do not need to connect pre-charging resistor to the main contactor, which further improves the reliability of the system;
Built-in reliable hardware fault handling circuits such as over-current, over-voltage, under-voltage and over-temperature protect the system from external damage;
HPD (high pedal prohibition) function prevents misoperation and overspeed when electric vehicles are started, and ensures personal safety;
Built-in electric vehicle vacuum pump drive, power meter, pulse speed meter, fault indication and other outputs, as well as high-speed communication interface in line with automobile SJA 1939CAN- OPEN protocol, fully meet the use platform of electric vehicle and HEV system;
The main power supply structure adopts the most advanced double-sided aluminum substrate high current process in Zheng Song, which further reduces EMI, optimizes the power density of the system, makes the controller more compact and further improves the power density.
A three-phase bridge composed of high-quality imported power MOSFET or rigorously screened IGBT has the lowest turn-on voltage drop, which further reduces the switching loss of the controller itself.
Up to IPX5 splash-proof integrated shell, durable and elegant;
Meet or exceed the requirements of EEC for fault detection.
3). Permanent magnet synchronous motor product series
abstract
Zheng Song series motors are a series of new high-efficiency motors tailored for the new energy electric vehicle industry. This series of motors are not only efficient and energy-saving, but also small in size, low in noise and high in self-protection. They are suitable for all kinds of complex and harsh environments and can fully meet the requirements of automobile use. The motor itself has a large overload multiple, which can provide powerful power support for the automobile under various working conditions.
trait
Wide speed range; High speed regulation accuracy; High performance; High and low speed torque; Low temperature rise and long service life; High overload multiple; High efficiency and high power factor; Small size and light weight; The energy-saving effect is remarkable; Strong universality and adaptability; Reliability, etc.