Design of a Dynamometer as a Measuring Tool for Power Efficiency and Performance Characteristics of a Brushless DC Motors

Automotive technology is developing very rapidly. Especially in conventional oil-fueled vehicles that can make it easier for humans to carry out mobility. However, these technological developments still have negative impacts on the environment, one of which is the emissions produced by oil-fueled vehicles, besides that these vehicles still depend on the availability of fossil oil which is a limited natural resource. This makes people motivated to increase creativity and innovation in order to reduce the use of fossil fuels, one of which is the use of electric vehicles that can be used as a solution to these problems. In the use of electric vehicles, the main component is needed, namely an electric motor as a driving component of a vehicle. The selection of an electric motor that is suitable for use in electric vehicles needs to pay attention to several aspects. Among them are ease of control, high speed range, torque that suits your needs, sufficient power, and high efficiency. There are several methods to determine the characteristics of a driving motor, one of which is to use a Dynamometer measuring instrument. Dynamometer is a tool to measure the power of a machine, motor or other rotating drive. Dynamometer is used to measure the power, torque, speed and efficiency of the driving motor transmitted by the rotating shaft. There are several types of dynamometers, one of which is the fly wheel dynamometer. Fly wheel dynamometer is a dynamometer that uses a roller as a power absorber from a driving motor. The results of this study are the value of the characteristics of a BLDC motor, namely the value of speed, acceleration, torque, mechanical power and electrical power and the final result of the calculation is the value of the power efficiency of a BLDC motor obtained from the comparison of the value of mechanical power (output power) generated by the value of the electrical power (input power) used to drive the BLDC motor.