Abstract: A zero backlash right angle transmission system includes an input shaft with an input gear, an output shaft, first and second drive gears mounted on respective drive shafts and meshing with the input gear, and first and second pairs of meshing gears, rotation axes of which are disposed at right angle to each other. One of the pair of meshing gears is mounted on the drive shaft and the other one is mounted on the output shaft. The system may also include first and second planetary gear assemblies. All of the gears form a closed loop gear train that drives the output shaft forward and backward without backlash. A method for zero backlash right angle transmission is also disclosed.

Abstract: A zero backlash right angle transmission system includes an input shaft with an input gear, an output shaft, first and second drive gears mounted on respective drive shafts and meshing with the input gear, and first and second pairs of meshing gears, rotation axes of which are disposed at right angle to each other. One of the pair of meshing gears is mounted on the drive shaft and the other one is mounted on the output shaft. The system may also include first and second planetary gear assemblies. All of the gears form a closed loop gear train that drives the output shaft forward and backward without backlash. A method for zero backlash right angle transmission is also disclosed.

Abstract: A zero backlash right angle transmission system includes an input shaft with an input gear, an output shaft, first and second drive gears mounted on respective drive shafts and meshing with the input gear, and first and second pairs of meshing gears, rotation axes of which are disposed at right angle to each other. One of the pair of meshing gears is mounted on the drive shaft and the other one is mounted on the output shaft. The system may also include first and second planetary gear assemblies. All of the gears form a closed loop gear train that drives the output shaft forward and backward without backlash. A method for zero backlash right angle transmission is also disclosed.

Abstract: A gate control circuit for controlling gates of at least a half side of an H-bridge circuit includes: an input terminal configured to connect to a PWM signal; a power terminal configured to connect to a voltage source that supplies a positive voltage; a ground terminal configured to connect to a ground reference; and a control circuit connected with the input terminal, the power terminal, and the ground terminal. The control circuit includes: two high side switches configured to be connected with the voltage source respectively through the power terminal; two low side switches configured to be connected with the ground reference respectively through the ground terminal; a first inverter connecting the two high side switches; a second inverter connecting the two low side switches; and a first resistor and a second resistor connecting the two high side switches to the two low side switches respectively.

Abstract: A gate control circuit for controlling gates of at least a half side of an H-bridge circuit includes: an input terminal configured to connect to a PWM signal; a power terminal configured to connect to a voltage source that supplies a positive voltage; a ground terminal configured to connect to a ground reference; and a control circuit connected with the input terminal, the power terminal, and the ground terminal. The control circuit includes: two high side switches configured to be connected with the voltage source respectively through the power terminal; two low side switches configured to be connected with the ground reference respectively through the ground terminal; a first inverter connecting the two high side switches; a second inverter connecting the two low side switches; and a first resistor and a second resistor connecting the two high side switches to the two low side switches respectively.