Скачать или смотреть Electric Motor Bridge Amplifier Explained

Motor Driver Circuit Design with Bridge Amplifier is explained and analyzed in this video. How does the bridge-connected motor driver work? What is the output voltage or motor driver voltage as a function of input voltage? What are the proper choices for Op Amp and high-current buffer? These questions are answered in this video. This motor driver circuit effectively realizes a single-input to differential-output amplifier that is designed with two operational amplifiers and two high-current buffers that are wired to form a generalized non-inverting amplifier on one side and a generalized inverting amplifier on the other side of the motor with high-current buffer in the negative feedback loop of the amplifier. This design allows to use a low-current op amp. The differential output voltage doubles the motor drive voltage. A combination of Kirchhoff Circuit laws KCL, KVL and op amp virtual short are used to analyze this circuit and to find the formula for the output voltage. Examples of proper choices for circuit components are discussed including the Texas Instrument's dual-channel OPA2810 op amp and LMH6321 high speed buffer with adjustable current up to 300mA. More analog circuit videos are available in the    • Physics and Mechanics Videos   Analog Video Playlist.