Kinetic energy recovery system with flywheel

A kinetic energy recovery system with flywheel, comprising:

• a cascade flywheel doubly-fed electric machine, having a doubly-fed electric machine and a flywheel inertial rotor connected to each other, wherein the cascade flywheel doubly-fed electric machine has a stator end coil, a rotor end coil and a flywheel, and the flywheel can store kinetic energy by increasing speed or releasing kinetic energy by decreasing speed;
• a control circuit, having an inverter, a rectifier and a DC bus connecting the inverter and the rectifier, wherein the inverter is used to supply alternating current to the rotor end coil, the rectifier has an AC end connected to the stator end coil through an AC bus, and the rectifier converts alternating current to direct current, so that the inverter can draw power from the DC bus;
• and
• an electric motor, having a phase coil connected to the AC bus using a three-phase transformer, wherein when the cascade flywheel double-fed electric machine decelerates, the cascade flywheel double-fed electric machine converts mechanical energy into electrical energy, and provides the electrical energy to the electric motor through the AC bus, so that the electric motor outputs rotating mechanical energy, wherein the electric motor can recover mechanical energy into electrical energy, which is then transferred to the stator end coil of the cascade flywheel doubly-fed electric machine by the AC bus, so that the cascade flywheel doubly-fed electric machine can convert electrical energy into mechanical energy, and increase the speed of the flywheel to store kinetic energy.

A kinetic energy recovery system with flywheel, comprising:

• a modulation flywheel doubly-fed electric machine, having a second stator end coil, a third stator end coil and a flywheel, wherein the flywheel can store kinetic energy by increasing speed or releasing kinetic energy by decreasing speed;
• a control circuit, having an inverter, a rectifier and a DC bus connecting the inverter and the rectifier, wherein the inverter is used to supply alternating current to the third stator end coil, the rectifier has an AC end connected to second stator end coil through an AC bus, and the rectifier converts alternating current to direct current, so that the inverter can draw power from the DC bus;
• and
• an electric motor, having a phase coil connected to the AC bus, wherein when the modulation flywheel doubly-fed electric machine decelerates, the modulation flywheel double-fed electric machine converts mechanical energy into electrical energy, and provides the electrical energy to the electric motor through the AC bus, so that the electric motor outputs rotating mechanical energy, wherein the electric motor can recover mechanical energy into electrical energy, which is then transferred to the second stator end coil of the modulation flywheel doubly-fed electric machine by the AC bus, so that the modulation flywheel doubly-fed electric machine can convert electrical energy into mechanical energy, and increase the speed of the flywheel to store kinetic energy.

A kinetic energy recovery system with flywheel, comprising:

• a modulation flywheel doubly-fed electric machine, having a second stator end coil, a third stator end coil and a flywheel, wherein the flywheel can store kinetic energy by increasing speed or releasing kinetic energy by decreasing speed;
• a control circuit, having an inverter, a rectifier and a DC bus connecting the inverter and the rectifier, wherein the inverter is used to supply alternating current to the third stator end coil, the rectifier has an AC end connected to second stator end coil through an AC bus, and the rectifier converts alternating current to direct current, so that the inverter can draw power from the DC bus;
• and
• an electric motor, having a phase coil connected to the AC bus using a three-phase transformer, wherein when the modulation flywheel doubly-fed electric machine decelerates, the modulation flywheel double-fed electric machine converts mechanical energy into electrical energy, and provides the electrical energy to the electric motor through the AC bus, so that the electric motor outputs rotating mechanical energy, wherein the electric motor can recover mechanical energy into electrical energy, which is then transferred to the second stator end coil of the modulation flywheel doubly-fed electric machine by the AC bus, so that the modulation flywheel doubly-fed electric machine can convert electrical energy into mechanical energy, and increase the speed of the flywheel to store kinetic energy.