Powertrain Related Products Products for Electric and Hybrid Vehicles

The demand for hybrid and electric vehicles is increasing in response to environmental issues. DENSO energy control products have contributed to their success, as well as to the realization of hybrid vehicles that offer low CO2 emissions and high fuel efficiency.  

Components

Inverter PCU (Power Control Unit)

Hybrid vehicles are driven by multiple power sources, such as an internal combustion engine and an electric motor. A combination of such power sources increases fuel efficiency. The Power Control Unit has an inverter and other devices to regulate the current flow from the battery to the electric motor. The Power Control Unit is given instructions by the Hybrid Vehicle ECU on how to convert the direct current from the battery to alternating current of the optimal frequency and voltage.

Motor Generator

A Motor Generator is a component of drive motors for hybrid vehicles. A motor stator (stator) with a rotor at its center as a rotating permanent magnet operates as a motor. When an alternating current flows through the coils of a stator, the stator works as an electromagnet. The magnetic field generated by this electromagnet rotates because the north and south poles of the electromagnet switch over as the alternating current reverses direction. Under the force of magnetism, the rotor then spins following the rotation of the magnetic field.

DC-DC Converter

Hybrid vehicles are driven by multiple power sources, such as an internal combustion engine and an electric motor. A combination of such power sources increases fuel efficiency. Hybrid vehicles have high-voltage electricity packs rated at over 200 volts to generate enough power to drive their motors. Just like gasoline and diesel vehicles, hybrid vehicles need a low-voltage battery rated at 12 volts for their lights, windshield wipers, ECUs (computers) to control their systems, and other electric devices. The DC-DC Converter converts a high-voltage direct current to a low-voltage direct current.

Battery Monitoring Unit

Hybrid vehicles are driven by multiple power sources, such as an internal combustion engine and an electric motor. A combination of such power sources increases fuel efficiency. Hybrid vehicles have high-voltage battery packs rated at over 200 volts to generate enough power to drive their motors. These high-voltage battery packs contain many low-voltage battery cells connected in series. The Battery Monitoring Unit monitors the voltage and temperature of the individual low-voltage battery cells. In other words, this unit constantly assesses the state of the battery cells.

Battery Current Sensor

The Battery Current Sensor measures the flow of electricity into and out of traction batteries for hybrid vehicles. These measured values are used to calculate the battery charge status (the remaining battery capacity) for optimal control of the traction motors and generators for hybrid vehicles.

System Main Relay (High Voltage)


Hybrid vehicles are driven by multiple power sources, such as an internal combustion engine and an electric motor. A combination of such power sources increases fuel efficiency. Hybrid vehicles have high-voltage battery packs to generate enough power to drive their motors. The System Main Relay acts as a switch between the battery packs and electric circuit of a hybrid vehicle. This relay is closed when the hybrid vehicle is traveling and is open when the vehicle is stopped. In the event of a collision or other emergency, the System Main Relay shuts down the high-current circuit to keep the vehicle safe.

Hybrid Vehicle Electronic Control Unit

Hybrid vehicles are driven by multiple power sources, such as an internal combustion engine and an electric motor. A combination of such power sources increases fuel efficiency. The Hybrid Vehicle ECU is a computer that controls the engine, how much power comes from the engine and electric motor, the charge and discharge of the high-voltage batteries, and other system operations.