Synchronous Reluctance Motor (SRM) requires significant levels of technology to design and to manufacture but it costs less than Permanent Magnet motor and doesn’t requires the rare earth material which may in short supply.

Compare to PM, the torque range on the SRM is better and less susceptible to heat damage. SRM Can reaches higher rpm than PM. The starting current is much lower and generate less heat.

Use SiC MOSFET (Silicon Carbide Metal-Oxide-Semiconductor-Field-Effect) chip in motor controller/invertor for its low heat generation, small in size, increased current density and higher switching voltage. As a result, the controller is smaller, lighter and generate less heat.

With the increase of battery size on the bus, the voltage of the battery increases as well to accommodate fast charging facility. Many newer buses employ up to 1200 volts battery. This system can be achieved only with SIC MOSFET controller.