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US 9,919,610 B1Granted
Wireless power electronics and controls
AssigneeThe Florida International University Board of Trustees
InventorsArif Sarwat, Masood Moghaddami
Life of this patent
Estimating the term…
Abstract
Magnetic-coupling-based wireless power transfer systems and schemes are provided that ensure fast wireless power transfer to charge batteries of electric vehicles (EVs) with high power transfer efficiencies and safety to humans and other animals in or near the EVs. A wireless power transfer system can include a direct 3-phase AC/AC converter with a circuit topology that enables bidirectional power flow. The direct 3-phase AC/AC converter can convert a power input at a low frequency, such as 3-phase 50/60 Hz, into a power output at a high frequency, such as a frequency in a range of 10-85 kHz for wireless power transfer applications.
Claims17
A method for direct three-phase ac-ac matrix conversion for inductive power transfer (IPT) comprising:
- providing a three-phase ac-ac matrix converter including:
- a first line, a second line, a third line, and a fourth line, all of which are connected in parallel;
- a first phase input connected to the first line and having a first phase input voltage (Vg), a second phase input connected to the second line and having a second phase input voltage (Vb), and a third phase input connected to the third line and having a third phase input voltage (Vc);
- a first switch (SA1) and a second switch (SA2) connected in series on the first line and on opposite sides of a first phase input connection;
- a third switch (SB1) and a fourth switch (SB2) connected in series on the second line and on opposite sides of a second phase input connection;
- a fifth switch (SC1) and a sixth switch (SC2) connected in series on the third line and on opposite sides of a third phase input connection;
- and
- a seventh switch (SF) on the fourth line;
- and
- a seventh diode (DF) that is in parallel with the seventh switch (SF) on the fourth line in the three-phase ac-ac matrix converter;
- providing a reference current (iref);
- providing a reference voltage (νref);
- providing a reference power (Pref);
- measuring a peak output resonance current (ip);
- and
- changing how current flows through the three-phase ac-ac matrix converter based on one or more control modes,
- wherein the three-phase ac-ac matrix converter operates in a current regulation control mode according to rules in the following table:
- SWITCHING STATES IN DIFFERENT MODES OF OPERATION IN
- CURRENT REGULATION CONTROL MODE.
- Conducting
- Mode
- Resonant Current
- Input Voltages
- Switches
- 1
- ip < 0, |ip| < iref
- Vb < Vc < Va
- SA1, SB2
- 2
- ip < 0, |ip| < iref
- Vc < Vb < Va
- SA1, SC2
- 3
- ip < 0, |ip| < iref
- Va < Vc < Vb
- SB1, SA2
- 4
- ip < 0, |ip| < iref
- Vc < Va < Vb
- SB1, SC2
- 5
- ip < 0, |ip| < iref
- Vb < Va < Vc
- SC1, SB2
- 6
- ip < 0, |ip| < iref
- Va < Vb < Vc
- SC1, SA2
- 7
- ip < 0, |ip| > iref
- —
- DF
- 8
- ip > 0
- —
- SF.
53 more elements
A method for direct three-phase ac-ac matrix conversion for inductive power transfer (IPT) comprising:
- providing a three-phase ac-ac matrix converter including:
- a first line, a second line, a third line, and a fourth line, all of which are connected in parallel;
- a first phase input connected to the first line and having a first phase input voltage (Va), a second phase input connected to the second line and having a second phase input voltage (Vb), and a third phase input connected to the third line and having a third phase input voltage (Vc);
- a first switch (SA1) and a second switch (SA2) connected in series on the first line and on opposite sides of a first phase input connection;
- a third switch (SB1) and a fourth switch (SB2) connected in series on the second line and on opposite sides of a second phase input connection;
- a fifth switch (SC1) and a sixth switch (SC2) connected in series on the third line and on opposite sides of a third phase input connection;
- and
- a seventh switch (SF) on the fourth line;
- and
- a seventh diode (DF) that is in parallel with the seventh switch (SF) on the fourth line in the three-phase ac-ac matrix converter;
- providing a reference current (iref);
- providing a reference voltage (νref);
- providing a reference power (Pref);
- measuring a peak output resonance current (ip);
- measuring a peak output resonance voltage (νp);
- and
- changing how current flows through the three-phase ac-ac matrix converter based on one or more control modes,
- wherein the three-phase ac-ac matrix converter operates in a voltage regulation control mode according to the rules in following table:
- SWITCHING STATES IN DIFFERENT MODES OF OPERATION
- IN VOLTAGE REGULATION CONTROL MODE
- Resonant Current &
- Conducting
- Mode
- Current
- Input Voltages
- Switches
- 1
- vp < 0, |vp| < vref
- Vb < Vc < Va
- SA1, SB2
- 2
- vp < 0, |vp| < vref
- Vc < Vb < Va
- SA1, SC2
- 3
- vp < 0, |vp| < vref
- Va < Vc < Vb
- SB1, SA2
- 4
- vp < 0, |vp| < vref
- Vc < Va < Vb
- SB1, SC2
- 5
- vp < 0, |vp| < vref
- Vb < Va < Vc
- SC1, SB2
- 6
- vp < 0, |vp| < vref
- Va < Vb < Vc
- SC1, SA2
- 7
- vp < 0, |vp| > vref
- —
- DF
- 8
- ip > 0
- —
- SF.
55 more elements
A method for direct three-phase ac-ac matrix conversion for inductive power transfer (IPT) comprising:
- providing a three-phase ac-ac matrix converter including:
- a first line, a second line, a third line, and a fourth line, all of which are connected in parallel;
- a first phase input connected to the first line and having a first phase input voltage (Va), a second phase input connected to the second line and having a second phase input voltage (Vb), and a third phase input connected to the third line and having a third phase input voltage (Vc);
- a first switch (SA1) and a second switch (SA2) connected in series on the first line and on opposite sides of a first phase input connection;
- a third switch (SB1) and a fourth switch (SB2) connected in series on the second line and on opposite sides of a second phase input connection;
- a fifth switch (SC1) and a sixth switch (SC2) connected in series on the third line and on opposite sides of a third phase input connection;
- and
- a seventh switch (SF) on the fourth line;
- and
- a seventh diode (DF) that is in parallel with the seventh switch (SF) on the fourth line in the three-phase ac-ac matrix converter;
- providing a reference current (iref);
- providing a reference voltage (νref);
- providing a reference power (Pref);
- measuring a peak output resonance current (ip);
- measuring output power (Pout);
- and
- changing how current flows through the three-phase ac-ac matrix converter based on one or more control modes,
- wherein the three-phase ac-ac matrix converter operates in a power regulation control mode according to rules in the following table:
- SWITCHING STATES IN DIFFERENT MODES OF OPERATION IN
- POWER REGULATION CONTROL MODE
- Output Power &
- Conducting
- Mode
- Resonant Current
- Input Voltages
- Switches
- 1
- Pout < Pref, ip < 0
- Vb < Vc < Va
- SA1, SB2
- 2
- Pout < Pref, ip < 0
- Vc < Vb < Va
- SA1, SC2
- 3
- Pout < Pref, ip < 0
- Va < Vc < Vb
- SB1, SA2
- 4
- Pout < Pref, ip < 0
- Vc < Va < Vb
- SB1, SC2
- 5
- Pout < Pref, ip < 0
- Vb < Va < Vc
- SC1, SB2
- 6
- Pout < Pref, ip < 0
- Va < Vb < Vc
- SC1, SA2
- 7
- Pout > Pref, ip < 0
- —
- DF
- 8
- ip > 0
- —
- SF.
55 more elements
Dependencies are inferred from the claim text.