초록 ▼

A radio controlled (R/C) speed controller with a synchronous flyback circuit includes a first node for connection to a first battery terminal and a first motor terminal, a second node for connection to a second battery terminal, and a third node for connection to a second motor terminal. A drive sub

A radio controlled (R/C) speed controller with a synchronous flyback circuit includes a first node for connection to a first battery terminal and a first motor terminal, a second node for connection to a second battery terminal, and a third node for connection to a second motor terminal. A drive subcircuit is connected between the second and third nodes for switching between a DRIVE ON state a DRIVE OFF state, a brake subcircuit is connected between the first and third nodes for switching between a BRAKE ON state and a BRAKE OFF state, and a control subcircuit switches the drive and brake subcircuits under program control. The brake subcircuit includes a diode that is connected across the first and third nodes in order to conduct flyback current, the control subcircuit includes a sensing subcircuit for sensing when the diode is forward biased beyond a predetermined threshold level as an indication that the diode is conducting the flyback current, and the control subcircuit is programmed to switch the brake subcircuit to the BRAKE ON state in synchronism with the diode being forward biased beyond the predetermined threshold level in order to thereby more efficiently conduct the flyback current.

대표청구항 ▼

[ What is claimed is:] [1.] A speed controller circuit for a radio controlled model, comprising:a first node for connection to a first battery terminal and a first motor terminal, a second node for connection to a second battery terminal, and a third node for connection to a second motor terminal;dr

[ What is claimed is:] [1.] A speed controller circuit for a radio controlled model, comprising:a first node for connection to a first battery terminal and a first motor terminal, a second node for connection to a second battery terminal, and a third node for connection to a second motor terminal;drive subcircuit means connected between the second and third nodes for switching between a DRIVE ON state and a DRIVE OFF state of the drive subcircuit;brake subcircuit means connected between the first and third nodes for switching between a BRAKE ON state and a BRAKE OFF state of the brake subcircuit; andcontrol subcircuit means connected to the drive subcircuit and the brake subcircuit for switching the drive subcircuit and the brake subcircuit under program control;wherein the brake subcircuit includes a diode connected across the first and third nodes as means for conducting a flyback current;wherein the control subcircuit means includes sensing means for sensing when the diode is forward biased beyond a predetermined threshold level as an indication that the diode is conducting the flyback current; andwherein the control subcircuit means is programmed to switch the brake subcircuit to the BRAKE ON state in synchronism with the diode being forward biased beyond the predetermined threshold level in order to thereby more efficiently conduct the flyback current.