Charge control device and electrically driven vehicle
Commercial AC voltage applied to an input terminal ( 90 ) from a commercial power supply external to the vehicle is boosted by a transformer ( 86 ) to a voltage level higher than the voltage (VB) of an electricity storage device (B) to be applied to neutral points (N 1 , N 2 ). In a charging mode of the electricity storage device (B) from a commercial power supply, all npn transistors of an inverter ( 20, 30 ) are turned off. The AC voltage applied to the neutral points (N 1 , N 2 ) is rectified by an anti-parallel diode of the inverter ( 20, 30 ) to be supplied onto a power supply line (PL 2 ). A boost converter ( 10 ) controls the charging current from the power supply line (PL 2 ) towards the electricity storage device (B).
1. A charge control device to charge an electricity storage device (B), comprising:
a first polyphase winding ( 12 ) that is star-connected,
a second polyphase winding ( 14 ) that is star-connected,
first and second inverters ( 20 , 30 ) connected to said first and second polyphase windings ( 12 , 14 ), respectively, and including an anti-parallel diode (D 11 -D 16 , D 21 -D 26 ) connected in parallel with each switching element (Q 11 -Q 16 , Q 21 -Q 26 ),
a converter ( 10 ) arranged between each of said first and second inverters ( 20 , 30 ) and said electricity storage device (B), and
a boosting device ( 86 ) arranged between each of a first neutral point (N 1 ) of said first polyphase winding ( 12 ) and a second neutral point (N 2 ) of said second polyphase winding ( 14 ) and a power supply, boosting voltage supplied from said power supply to a voltage level higher than the voltage of said electricity storage device (B) to provide the boosted voltage to said first and second neutral points (N 1 , N 2 ), wherein
said first and second inverters ( 20 , 30 ) output the voltage boosted and applied to said first and second neutral points (N 1 , N 2 ) by said boosting device ( 86 ) to said converter ( 10 ) via said anti-parallel diode (D 11 -D 16 , D 21 -D 26 ),
said converter ( 10 ) receives voltage output from said first and second inverters ( 20 , 30 ) to charge said electricity storage device (B).
2. The charge control device according to claim 1 , wherein
the voltage supplied from said power supply is AC voltage,
said boosting device ( 86 ) includes a transformer boosting the AC voltage supplied from said power supply, and
said first and second inverters ( 20 , 30 ) use said anti-parallel diode (D 11 -D 16 , D 21 -D 26 ) to rectify the AC voltage boosted and applied to said first and second neutral points (N 1 , N 2 ) by said transformer for output to said converter ( 10 ).
3. The charge control device according to claim 2 , wherein said power supply is an AC power supply for commercial use.
4. The charge control device according to claim 2 , wherein
said first and second polyphase windings ( 12 , 14 ) are included in first and second electric motors (MG 1 , MG 2 ) as stator windings, respectively, and
said first and second electric motors (MG 1 , MG 2 ), said electricity storage device (B), said converter ( 10 ), said first and second inverters ( 20 , 30 ), and a secondary winding ( 88 ) of said transformer are incorporated in an electrically driven vehicle with at least one of said first and second electric motors (MG 1 , MG 2 ) as a motive power source.
5. An electrically driven vehicle comprising:
an electricity storage device (B),
a first electric motor (MG 1 ) including a first polyphase winding ( 12 ) that is star-connected as a stator winding,
a second electric motor (MG 2 ) including a second polyphase winding ( 14 ) that is star-connected as a stator winding,
first and second inverters ( 20 , 30 ) provided corresponding to said first and second electric motors (MG 1 , MG 2 ), respectively, and including an anti-parallel diode (D 11 -D 16 , D 21 -D 26 ) connected in parallel with each switching element (Q 11 -Q 16 , Q 21 -Q 26 ),
a converter ( 10 ) arranged between each of said first and second inverters ( 20 , 30 ) and said electricity storage device (B), and
a boosting device ( 86 ) arranged between each of a first neutral point (N 1 ) of said first polyphase winding ( 12 ) and a second neutral point (N 2 ) of said second polyphase winding ( 14 ) and a power supply external to the vehicle, boosting voltage supplied from said power supply to a voltage level higher than the voltage of said electricity storage device (B) to provide the boosted voltage to said first and second neutral points (N 1 , N 2 ), wherein
when charging of said electricity storage device (B) is effected from said power supply,
said first and second inverters ( 20 , 30 ) output the voltage boosted and applied to said first and second neutral points (N 1 , N 2 ) by said boosting device ( 86 ) to said converter ( 10 ) via said anti-parallel diode (D 11 -D 16 , D 21 -D 26 ),
said converter ( 10 ) receives voltage output from said first and second inverters ( 20 , 30 ) to charge said electricity storage device (B).
6. The electrically driven vehicle according to claim 5 , wherein the voltage supplied from said power supply is AC voltage,
said boosting device ( 86 ) includes a transformer boosting the AC voltage supplied from said power supply, and
said first and second inverters ( 20 , 30 ) use said anti-parallel diode (D 11 -D 16 , D 21 -D 26 ) to rectify the AC voltage boosted and applied to said first and second neutral points (N 1 , N 2 ) by said transformer for output to said converter ( 10 ).
7. The electrically driven vehicle according to claim 6 , wherein said power supply is an AC power supply for commercial use.
8. The charge control device according to claim 1 , wherein said converter ( 10 ) charges said electricity storage device (B) while controlling charging current of said electricity storage device (B) based on a state of charge of said electricity storage device (B).
9. The electrically driven vehicle according to claim 5 , wherein said converter ( 10 ) charges said electricity storage device (B) while controlling charging current of said electricity storage device (B) based on a state of charge of said electricity storage device (B).