Vehicle motor switching apparatus
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorsToshihiro Nagano, Yasuaki Kyoukane
Life of this patent
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Abstract
Thers is provided a vehicle motor switching apparatus having an armature coil, a series circuit including a series coil and connecting the armature coil and a battery and a shunt coil, comprising a switch for connecting the shunt coil to the series circuit in parallel to the armature coil to set up the motor as a compound-wound motor when the shunt coil is connected to the series circuit, while set up the motor as a series motor when disconnected therefrom. The apparatus further comprises a switch for disconnecting the series coil from the series circuit to set up the motor as a shunt motor when the shunt coil is connected to the series circuit and the series circuit is disconnected therefrom.
Claims23
A switching apparatus for an electric motor mounted on a vehicle, having a battery, a motor for driving said vehicle depending on power from said battery, a motor control circuit for controlling said motor, an accelerator for said vehicle, accelerator depression sensing means for sensing the amount of accelerator depression vehicle speed sensing means for sensing a vehicle speed, voltage detecting means for detecting a terminal voltage of said battery and current detecting means for detecting a field current supplied to said motor, said motor including an armature coil connected to said battery, a shunt coil connected to said battery in parallel to said armature coil and a series coil connected to said battery in series to said armature coil, said major control circuit including first switching mean connected in series to said shunt coil, second switching means connected in series to said series coil and third switching means connected in parallel to said series coil and said first switching means, the apparatus comprising:
- consumed power calculation means for calculating an electrical consumed power of said motor based on said terminal voltage and said current;
- consumed power judging means for judging whether said consumed power is larger than a predetermined power value;
- and
- motor selection means for selecting a compound-wound motor when said consumed power judging means judges that said consumed power is larger than said predetermined power value and for controlling said first, second and third switching means so as to conduct current through both of said series coil and said shunt coil.
The apparatus according to claim 28, further comprising:
- consumed current judging means or judging whether said field current is smaller than a predetermined current value when said accelerator depression judging means judges that said accelerator depression is larger than said predetermined amount;
- said motor selection means being adapted to select a series motor and control said first, second and third switching means so as to conduct current through said series coil only when said consumed current judging means judges that said field current is smaller than said predetermined current value.
A switching apparatus for an electric motor mounted on a vehicle, having a battery, a motor for driving said vehicle depending on a power from said battery, a motor control circuit or controlling the status of said motor, an accelerator for said vehicle, accelerator depression sensing means for sensing the amount of accelerator depression, vehicle speed sensing means or sensing a vehicle speed, voltage detecting means for detecting a terminal voltage of said battery and current detecting means for detecting a field current supplied to said motor, said motor including an armature coil connected to said battery, a shunt coil connected to said battery in parallel to said armature coil and a series coil connected to said battery in series to said armature coil, said motor control circuit including first switching means connected in series to said shunt coil, second switching means connected in series to said series coil and third switching means connected in parallel to said saris coil and said first switching means, the apparatus comprising:
- consumed power calculation means for calculating electrical consumed power of said motor based on said terminal voltage and said current;
- and
- selection means for selecting one of a shunt motor, a series motor and a compound-wound motor based on the magnitude of said consumed power, said battery terminal voltage, said accelerator depression, said field current and said vehicle speed and for controlling said first, second and third switching means so as to make said motor function as the selected motor.
A switching apparatus for an electric motor mounted on a vehicle having an accelerator for controlling a vehicle speed, the apparatus which comprises:
- a battery;
- an armature coil connected to said battery;
- a shunt coil connected to said battery in parallel to said armature;
- a series coil connected to said battery in series to said armature;
- a first variable resistor provided between the shunt coil and the battery for varying the current applied to said shunt coil;
- a second variable resistor provided between the series coil and the battery or varying the voltage applied to said series coil;
- first switching mean provided in series with said first variable resistor for switching the battery and said hunt coil;
- second switching means provided in series with said second variable resistor switching the battier and said series coil;
- third switching means provided in parallel with said series coil and said second switching means for switching the batter and said armature;
- accelerator detecting means for detecting an operating value of the accelerator and for producing an accelerator signal;
- current detecting mean for detecting a current supplied to the motor nd for producing a current signal;
- voltage detecting means for detecting termainl voltage of the battery and for producing a voltage signal;
- vehicle speed sensor for detecting a vehicle speed and for providing a speed signal;
- power consumption calculating mean responsive to said voltage signal and said current signal for calculating an electrical power consumption and for producing a consumption signal;
- resistance controlling means responsive to said accelerator signal for controlling resistance of said first variable resistor and said second variable resistor;
- first judging means responsive to said consumption signal for judging whether said consumption signal is larger than a predetermined consumption value or not and for producing a first positive condition signal when said consumption signal is larger than said predetermined consumption value and for producing a first negative condition signal when said consumption signal is smaller tan said predetermined consumption value;
- second judging means responsive to said accelerator signal and said first negative condition signal for judging whether said accelerator signal is larger than a predetermined value onto and for producing a second positive condition signal when said accelerator signal is larger than said predetermine value and for producing a second negative condition signal when said accelerator signal is smaller than said predetermined value;
- third judging means responsive to said current signal and second negative condition signal for judging whether said current signal is smaller than a predetermined current value or not for producing a third positive condition signal when said current signal is larger than a predetermined current value and for producing a third negative condition signal when said current signal is smaller than said predetermined current value;
- fourth judging mean responsive to said speed signal and said third negative condition signal for judging whether said vehicle speed signal is larger than a predetermined speed and for producing a fourth positive condition signal when said vehicle speed signal is larger than a predetermined speed and for producing a fourth negative condition signal when said vehicle speed signal is smaller than said predetermined speed;
- first selecting means for switching on said firs switch means and said second switch means when receiving one of said first positive condition signal and said second negative condition signal;
- second selecting means for switching on said second switch when receiving one of said third positive condition signal and said fourth negative conditions signal;
- and
- third selecting means or switching on said first switch means and said third switch means when receiving said fourth positive condition signal so as to improve motor characteristics matching with travelling condition.
Dependencies are inferred from the claim text.