Loading patent…
AssigneeMeidensha Corporation
InventorsTakashi Yamaguchi, Toru Kakebayashi
Estimating the term…
Accurate power consumption is calculated without raising cost, or making the device bigger. Power consumption (P) upon driving a motor is calculated from an input voltage (Vdc), a switching duty factor of a switching device (SW1) of a chopper circuit (ch), which is provided with the switching device (SW1) and a reactor (Ldc), a reactor current (Idc), motor winding reactance (Lm), and motor rotation speed (N), in a motor driving device wherein: the input voltage (Vdc) inputted to the chopper circuit (ch) is stepped down by the chopper circuit (ch); DC power outputted by the chopper circuit (ch) is converted to AC power by driving an inverter (INV) with 120-degree conduction, and outputted to a motor (M); and surge voltage to be generated when the inverter (INV) undergoes commutation is clamped to the input voltage (Vdc), by a diode (D1) connected in inverse-parallel to the chopper circuit (ch).
A power consumption calculating method for a motor driving device configured to step down an input voltage inputted to a chopper circuit by the chopper circuit including a series circuit of a first switching element having one end connected to a positive voltage side of the inputted direct-current voltage, and a reactor having one end connected to the other end of the first switching element, and a second switching element disposed between the connection point between the other end of the first switching element and the one end of the reactor, and a negative voltage side of the input voltage, to convert a direct-current power outputted from the chopper circuit to an alternating-current power by driving an inverter by 120-degree conduction, to output to a motor, and to clamp a surge voltage generated at commutation of the inverter to the input voltage by a diode connected in inverse-parallel to the series circuit, the power consumption calculating method comprising:
A control method for a motor driving device configured to step down an input voltage inputted to a chopper circuit by the chopper circuit including a series circuit of a first switching element having one end connected to a positive voltage side of the inputted direct-current voltage, and a reactor having one end connected to the other end of the first switching element, and a second switching element disposed between the connection point between the other end of the first switching element and the one end of the reactor, and a negative voltage side of the input voltage, to convert a direct-current power outputted from the chopper circuit to an alternating-current power by driving an inverter by 120-degree conduction, to output to a motor, and to clamp a surge voltage generated at commutation of the inverter to the input voltage by a diode connected in inverse-parallel to the series circuit, the control method comprising:
Dependencies are inferred from the claim text.