JP6269939B2 - Non-contact power supply system, non-contact power supply method, and secondary battery charging method - Google Patents
Non-contact power supply system, non-contact power supply method, and secondary battery charging method Download PDFInfo
- Publication number
- JP6269939B2 JP6269939B2 JP2014020293A JP2014020293A JP6269939B2 JP 6269939 B2 JP6269939 B2 JP 6269939B2 JP 2014020293 A JP2014020293 A JP 2014020293A JP 2014020293 A JP2014020293 A JP 2014020293A JP 6269939 B2 JP6269939 B2 JP 6269939B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- power supply
- coil
- primary coil
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 40
- 238000007600 charging Methods 0.000 title claims description 26
- 239000003990 capacitor Substances 0.000 claims description 69
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 230000005674 electromagnetic induction Effects 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 description 24
- 238000010280 constant potential charging Methods 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 238000010277 constant-current charging Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
本発明は、交流電源で駆動される一次コイルから、空隙を隔てて置かれた二次コイルに電磁誘導作用により電力を給電する非接触給電システム、及び、その非接触給電方法、並びに、その方法を利用して二次電池を充電する二次電池充電方法に関し、定電圧及び定電流での給電を簡単に変換できるようにしたものである。 The present invention relates to a non-contact power feeding system that feeds electric power from a primary coil driven by an AC power source to a secondary coil placed with a gap by electromagnetic induction, a non-contact power feeding method thereof, and a method thereof In regard to a secondary battery charging method for charging a secondary battery using a battery, power supply at a constant voltage and a constant current can be easily converted.
非接触給電は、電動歯ブラシや電気シェーバー等の電化製品、或いはコードレス電話機や携帯電話機等の電子機器で実用化されており、また、電気自動車や産業用機器への給電手段として注目を集めている。
図7(a)は、この非接触給電システムの回路構成の一例を示している。
給電側は、商用電源41の交流を直流に変換する直流供給部42と、直流供給部42の出力を平滑化する平滑コンデンサ43と、直流を高周波交流に変換するインバータ44と、この高周波交流が入力する一次コイル(送電コイル)46と、インバータ44と一次コイル45との間に直列接続された一次側直列コンデンサ45とを備えている。
一方、受電側は、電磁誘導作用により送電コイル46から電力が給電される二次コイル(受電コイル)47と、二次コイル47と並列に接続された二次側並列コンデンサ48と、二次コイル47で受電された交流を整流する整流回路49と、整流回路49の出力を平滑化する平滑コンデンサ50と、整流された電流で充電される二次電池51とを備えており、非接触給電トランスを構成する一次コイル46及び二次コイル47を介して、給電側から受電側に給電が行われる。
Non-contact power supply has been put to practical use in electric appliances such as electric toothbrushes and electric shavers, or electronic devices such as cordless telephones and mobile phones, and has attracted attention as a power supply means for electric vehicles and industrial equipment. .
FIG. 7A shows an example of the circuit configuration of this non-contact power feeding system.
The power supply side includes a DC supply unit 42 that converts AC of the commercial power supply 41 to DC, a smoothing capacitor 43 that smoothes the output of the DC supply unit 42, an inverter 44 that converts DC to high frequency AC, and this high frequency AC An input primary coil (power transmission coil) 46 and a primary side series capacitor 45 connected in series between an inverter 44 and a primary coil 45 are provided.
On the other hand, the power receiving side includes a secondary coil (power receiving coil) 47 to which power is supplied from the power transmitting coil 46 by electromagnetic induction, a secondary parallel capacitor 48 connected in parallel with the secondary coil 47, and a secondary coil. 47, a rectifier circuit 49 that rectifies the alternating current received at 47, a smoothing capacitor 50 that smoothes the output of the rectifier circuit 49, and a secondary battery 51 that is charged with the rectified current. Power is fed from the power feeding side to the power receiving side through the primary coil 46 and the secondary coil 47 constituting the.
一次側直列コンデンサ45及び二次側並列コンデンサ48は、一次コイルと二次コイルとの間に空隙を有する非接触給電トランスの漏れリアクタンスを補償して給電効率を高めるために接続されている。一次側に直列コンデンサを接続し、二次側に並列コンデンサを接続する方式は“SP方式”と呼ばれる。
図7(b)に示す非接触給電システムでは、一次側に直列コンデンサ55を接続し、二次側に直列コンデンサ58を接続している。この方式は“SS方式”と呼ばれる。
The primary side series capacitor 45 and the secondary side parallel capacitor 48 are connected in order to compensate for the leakage reactance of the non-contact power supply transformer having a gap between the primary coil and the secondary coil and to increase the power supply efficiency. A system in which a series capacitor is connected to the primary side and a parallel capacitor is connected to the secondary side is called an “SP system”.
In the non-contact power feeding system shown in FIG. 7B, a series capacitor 55 is connected to the primary side, and a series capacitor 58 is connected to the secondary side. This method is called “SS method”.
SP方式の非接触給電トランスは、図8(a)に示す簡略等価回路で表される。
図8(a)では、一次コイルの巻数をN1、二次コイルの巻数をN2として、一次側諸量は、巻数比a=N1/N2で二次側に換算しダッシュをつけて表している。インバータ出力電圧(一次入力電圧)をVIN、インバータ出力電流(一次入力電流)をIIN、負荷電圧(二次出力電圧)をVL、負荷電流(二次出力電流)をILで表すと、
V'IN=VIN/a I’IN=a×IIN
となる。また、一次自己インダクタンスをL1、二次自己インダクタンスをL2、相互インダクタンスをMとしている。
SP方式では、二次側のCpの値は、非接触給電トランスへの入力周波数f0(=ω0/2π)においてL2と共振するように、
(数1) 1/Cp=ω0 2L2
と設定され、一次側のCsの値は、一次側電源の出力力率が1となるように、
(数2) 1/Cs=a2/C’s=ω0 2(L1−M2/L2)
と設定される。
The SP-type non-contact power supply transformer is represented by a simplified equivalent circuit shown in FIG.
In FIG. 8A, the number of turns of the primary coil is N 1 , the number of turns of the secondary coil is N 2 , and the primary-side quantities are converted to the secondary side with a turn ratio a = N 1 / N 2 and a dash is added. It expresses. Inverter output voltage (primary input voltage) is expressed as V IN , inverter output current (primary input current) is expressed as I IN , load voltage (secondary output voltage) is expressed as V L , and load current (secondary output current) is expressed as I L. ,
V ′ IN = V IN / a I ′ IN = a × I IN
It becomes. The primary self-inductance is L 1 , the secondary self-inductance is L 2 , and the mutual inductance is M.
In the SP system, the value of C p on the secondary side resonates with L 2 at the input frequency f 0 (= ω 0 / 2π) to the non-contact power supply transformer.
(Equation 1) 1 / C p = ω 0 2 L 2
The value of C s on the primary side is set so that the output power factor of the primary side power supply is 1.
(Equation 2) 1 / C s = a 2 / C ′ s = ω 0 2 (L 1 −M 2 / L 2 )
Is set.
一次入力電圧V'IN、一次入力電流I'IN、二次出力電圧VL、二次出力電流ILの関係は、F行列を用いて(数3)のように表すことができる。
SP方式のF行列は、(数6)のようになる。
F12=F21=0
F11=1/F22=M/(aL2)
であるため、
(数7) V'IN=VIN/a=(M/(aL2))VL
VIN=(M/L2)VL
となる。
(数7)は、SP方式の非接触給電トランスを定電圧電源で駆動した場合、二次側の出力が定電圧出力になることを示している。
なお、非接触給電トランスの結合係数kは、
k=M/(L1×L2)1/2
で表されるが、M/aL2は、一般に結合係数kに近い値となる(M/aL2≒k)。
The F matrix of the SP method is as shown in (Expression 6).
F 12 = F 21 = 0
F 11 = 1 / F 22 = M / (aL 2 )
Because
(Equation 7) V ′ IN = V IN / a = (M / (aL 2 )) V L
V IN = (M / L 2 ) V L
It becomes.
(Equation 7) indicates that when the SP-type non-contact power supply transformer is driven by a constant voltage power source, the output on the secondary side becomes a constant voltage output.
The coupling coefficient k of the non-contact power supply transformer is
k = M / (L 1 × L 2 ) 1/2
In general, M / aL 2 is a value close to the coupling coefficient k (M / aL 2 ≈k).
図8(b)は、SS方式の非接触給電トランスの簡略等価回路を示している。
SS方式では、一次側のCS1の値は、入力周波数f0においてL1と共振するように、
(数8) 1/CS1=ω0 2L1
と設定され、二次側のCS2の値は、入力周波数f0においてL2と共振するように、
(数9) 1/CS2=ω0 2L2
と設定される。
簡略等価回路をA、B、C、D、E’に5分割すると、A、B、C、D、E’の各行列は、f0=ω0/2πのとき(数10)のようになり、
In the SS system, the value of C S1 on the primary side resonates with L 1 at the input frequency f 0 .
(Equation 8) 1 / C S1 = ω 0 2 L 1
So that the value of C S2 on the secondary side resonates with L 2 at the input frequency f 0 ,
(Equation 9) 1 / C S2 = ω 0 2 L 2
Is set.
When the simplified equivalent circuit is divided into five parts A, B, C, D, and E ′, each matrix of A, B, C, D, and E ′ is expressed as (Equation 10) when f 0 = ω 0 / 2π. Become
このF行列では、
F11=F22=0
F12=1/F21=−jω0M/a
であるため、
(数12) V'IN=VIN/a=F12・IL
VIN=a・F12・IL
となる。
(数12)は、SS方式の非接触給電トランスを定電圧電源で駆動した場合、二次側の出力が定電流出力になることを示している。
In this F matrix,
F 11 = F 22 = 0
F 12 = 1 / F 21 = −jω 0 M / a
Because
(Equation 12) V ′ IN = V IN / a = F 12 · I L
V IN = a ・ F 12・ I L
It becomes.
(Equation 12) shows that when the SS-type non-contact power supply transformer is driven by a constant voltage power source, the secondary side output becomes a constant current output.
ところで、二次電池、特に、リチウム系二次電池では、充電効率を高め、且つ、過充電を防止するため、定電流で所定電圧まで充電した後、充電終了まで定電圧を保持する“定電流定電圧充電”が行われる。
例えば、下記特許文献1には、非接触給電の受電側の整流器と二次電池との間に充電器を配置して、この充電器が、二次電池に対する定電流定電圧充電を制御するシステムが記載されている。
By the way, in a secondary battery, in particular, a lithium-based secondary battery, in order to increase charging efficiency and prevent overcharge, after charging to a predetermined voltage with a constant current, the “constant current” is maintained until the end of charging. “Constant voltage charging” is performed.
For example, Patent Document 1 below discloses a system in which a charger is disposed between a rectifier on the power-receiving side of non-contact power feeding and a secondary battery, and the charger controls constant current and constant voltage charging for the secondary battery. Is described.
しかし、非接触給電において二次電池を充電する際の充電制御は複雑である。
本発明は、こうした事情を考慮して創案したものであり、非接触給電の出力を定電圧出力または定電流出力に簡単に切換えることができる非接触給電システム、及び、非接触給電方法を提供し、また、それを利用した二次電池充電方法を提供することを目的としている。
However, charging control when charging a secondary battery in non-contact power feeding is complicated.
The present invention was devised in view of such circumstances, and provides a non-contact power supply system and a non-contact power supply method capable of easily switching the output of the non-contact power supply to a constant voltage output or a constant current output. It is another object of the present invention to provide a secondary battery charging method using the same.
本発明は、空隙を隔てて置かれた一次コイル及び二次コイルで構成されるトランスを備え、交流電源で駆動される一次コイルから、二次コイルに電磁誘導作用により電力が給電される非接触給電システムであって、一次コイルに直列に接続された直列コンデンサCsと、二次コイルに並列に接続された並列コンデンサCpと、交流電源の周波数を制御する周波数制御手段と、を備え、交流電源の周波数がf0であるときの一次コイルの自己インダクタンスをL1、二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、並列コンデンサの値Cpが、
1/Cp≒(2π×f0)2×L2
に設定され、直列コンデンサの値Csが、
1/Cs≒(2π×f0)2×(L1−M2/L2)
に設定され、給電中の少なくとも一部期間に亘り、交流電源の周波数が、周波数制御手段により、f0と異なる周波数であって、トランスの出力が定電流出力となる周波数fXに設定されることを特徴とする。
このSP方式の非接触給電システムでは、定電圧で駆動される非接触給電トランスの交流電源の周波数をf0に設定すれば、(数3)のF行列のF12が0になって、二次側の出力が定電圧出力になり、交流電源の周波数を、(数3)のF行列のF11=0、F12≠0を満たす周波数fXに設定すれば、二次側の出力が定電流出力になる。
The present invention includes a transformer composed of a primary coil and a secondary coil that are spaced apart from each other, and a non-contact power is supplied to the secondary coil by electromagnetic induction from a primary coil driven by an AC power supply. An AC power supply comprising a series capacitor Cs connected in series to a primary coil, a parallel capacitor Cp connected in parallel to a secondary coil, and a frequency control means for controlling the frequency of the AC power supply. of L 1 the self-inductance of the primary coil when the frequency is f 0, the self-inductance of the secondary coil L 2, when the mutual inductance is M, the value Cp of the parallel capacitor,
1 / Cp≈ (2π × f 0 ) 2 × L 2
And the value Cs of the series capacitor is
1 / Cs≈ (2π × f 0 ) 2 × (L 1 −M 2 / L 2 )
The frequency of the AC power supply is set to a frequency different from f 0 by the frequency control means and to a frequency f X at which the transformer output becomes a constant current output for at least a part of the period during power feeding. It is characterized by that.
In this SP-type non-contact power supply system, if the frequency of the AC power supply of the non-contact power supply transformer driven by a constant voltage is set to f 0 , F 12 of the F matrix of (Equation 3) becomes 0, If the output on the secondary side becomes a constant voltage output and the frequency of the AC power supply is set to a frequency f X that satisfies F 11 = 0 and F 12 ≠ 0 in the F matrix of (Equation 3), the output on the secondary side will be Constant current output.
また、本発明の非接触給電システムでは、周波数制御手段が、給電の途中で、交流電源の周波数を、fXからf0、または、その逆に切換える。
この切換えにより、二次側の出力を定電流出力から定電圧出力に変えたり、その逆に変えたりすることができる。
Further, in the non-contact power feeding system of the present invention, the frequency control means switches the frequency of the AC power source from f X to f 0 or vice versa during power feeding.
By this switching, the output on the secondary side can be changed from a constant current output to a constant voltage output, or vice versa.
また、本発明のSP方式の非接触給電システムでは、トランスの結合係数を、
k=M/(L1×L2)1/2
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求めることにより、fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
として設定することができる。
In the SP-type non-contact power feeding system of the present invention, the coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
By obtaining the different positive values y 1, y 2 satisfies the a f X,
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
Can be set as
また、本発明のSP方式の非接触給電システムでは、一次コイルの巻数をN1、二次コイルの巻数をN2とし、交流電源の周波数がf0であるときの一次入力電圧をVIN、二次出力電圧をVLとするとき、トランスの結合係数を、
k≒c×(N2/N1)×(VIN/VL) (但し、cは一定の定数)
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求めることにより、fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
として設定することもできる。
In the SP-type non-contact power feeding system of the present invention, the primary input voltage when the number of turns of the primary coil is N 1 and the number of turns of the secondary coil is N 2 and the frequency of the AC power supply is f 0 is V IN , When the secondary output voltage is V L , the transformer coupling coefficient is
k≈c × (N 2 / N 1 ) × (V IN / V L ) (where c is a constant)
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
By obtaining the different positive values y 1, y 2 satisfies the a f X,
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
Can also be set.
また、本発明の非接触給電システムは、一次コイルに直列に接続された直列コンデンサCS1と、二次コイルに直列に接続された直列コンデンサCS2と、交流電源の周波数を制御する周波数制御手段と、を備え、交流電源の周波数がf0であるときの一次コイルの自己インダクタンスをL1、二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、一次コイルに接続された直列コンデンサの値CS1が、
1/CS1≒(2π×f0)2×L1
に設定され、二次コイルに接続された直列コンデンサの値CS2が、
1/CS2≒(2π×f0)2×L2
に設定され、給電中の少なくとも一部期間に亘り、交流電源の周波数が、周波数制御手段により、f0と異なる周波数であって、トランスの出力が定電圧出力となる周波数fYに設定されることを特徴とする。
このSS方式の非接触給電システムでは、定電圧で駆動される非接触給電トランスの交流電源の周波数をf0に設定すれば、(数3)のF行列のF11が0になって、二次側の出力が定電流出力になり、交流電源の周波数を、(数3)のF行列のF11≠0、F12=0を満たす周波数fYに設定すれば、二次側の出力が定電圧出力になる。
The contactless power feeding system of the present invention includes a series capacitor C S1 connected in series to the primary coil, a series capacitor C S2 connected in series to the secondary coil, and a frequency control means for controlling the frequency of the AC power supply. When the frequency of the AC power supply is f 0 , the primary coil self-inductance is L 1 , the secondary coil self-inductance is L 2 , and the mutual inductance is M, and the series connected to the primary coil The capacitor value C S1 is
1 / C S1 ≈ (2π × f 0 ) 2 × L 1
And the value C S2 of the series capacitor connected to the secondary coil is
1 / C S2 ≈ (2π × f 0 ) 2 × L 2
The frequency of the AC power supply is set to a frequency different from f 0 by the frequency control means and to a frequency f Y at which the output of the transformer becomes a constant voltage output for at least a part of the period during power feeding. It is characterized by that.
In this SS-type non-contact power supply system, if the frequency of the AC power supply of the non-contact power supply transformer driven by a constant voltage is set to f 0 , F 11 in the F matrix of (Equation 3) becomes 0, If the output on the secondary side becomes a constant current output and the frequency of the AC power supply is set to a frequency f Y that satisfies F 11 ≠ 0 and F 12 = 0 in the F matrix of (Equation 3), the output on the secondary side is Constant voltage output.
また、本発明のSS方式の非接触給電システムでは、トランスの結合係数を、
k=M/(L1×L2)1/2
として、fYを、
fY≒f0/(1+k)1/2
または、
fY≒f0/(1−k)1/2
として設定することができる。
In the SS contactless power supply system of the present invention, the coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As f Y
f Y ≒ f 0 / (1 + k) 1/2
Or
f Y ≒ f 0 / (1-k) 1/2
Can be set as
また、本発明の非接触給電方法は、一次コイルに直列に直列コンデンサCsを接続し、二次コイルに並列に並列コンデンサCpを接続し、交流電源の周波数がf0であるときの一次コイルの自己インダクタンスをL1、二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、並列コンデンサの値Cpを、
1/Cp≒(2π×f0)2×L2
に設定し、直列コンデンサの値Csを、
1/Cs≒(2π×f0)2×(L1−M2/L2)
に設定し、給電中の少なくとも一部期間に亘り、交流電源の周波数を、f0と異なる周波数であって、トランスの出力が定電流出力となる周波数fXに設定することを特徴とする。
このSP方式の非接触給電では、トランスの交流電源の周波数を、(数3)のF行列のF11=0、F12≠0を満たす周波数fXに設定することで、二次側の出力を定電流出力とすることができる。
In the non-contact power feeding method of the present invention, the series capacitor Cs is connected in series with the primary coil, the parallel capacitor Cp is connected in parallel with the secondary coil, and the frequency of the AC power supply is f 0 . When the self-inductance is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M, the value Cp of the parallel capacitor is
1 / Cp≈ (2π × f 0 ) 2 × L 2
And set the series capacitor value Cs to
1 / Cs≈ (2π × f 0 ) 2 × (L 1 −M 2 / L 2 )
And the frequency of the AC power supply is set to a frequency f X that is different from f 0 and at which the output of the transformer becomes a constant current output, for at least a part of the period during power feeding.
In this SP-type non-contact power supply, the output of the secondary side is set by setting the frequency of the AC power supply of the transformer to a frequency f X that satisfies F 11 = 0 and F 12 ≠ 0 of the F matrix in (Equation 3). Can be a constant current output.
また、本発明の非接触給電方法は、一次コイルに直列に直列コンデンサCS1を接続し、二次コイルに直列に直列コンデンサCS2を接続し、交流電源の周波数がf0であるときの一次コイルの自己インダクタンスをL1、二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、一次コイルに接続された直列コンデンサの値CS1を、
1/CS1≒(2π×f0)2×L1
に設定し、二次コイルに接続された直列コンデンサの値CS2を、
1/CS2≒(2π×f0)2×L2
に設定し、給電中の少なくとも一部期間に亘り、交流電源の周波数を、f0と異なる周波数であって、トランスの出力が定電圧出力となる周波数fYに設定することを特徴とする。
このSS方式の非接触給電では、トランスの交流電源の周波数を、(数3)のF行列のF11≠0、F12=0を満たす周波数fYに設定することで、二次側の出力を定電圧出力とすることができる。
In the non-contact power feeding method of the present invention, the series capacitor C S1 is connected in series to the primary coil, the series capacitor C S2 is connected in series to the secondary coil, and the primary when the frequency of the AC power supply is f 0. When the self-inductance of the coil is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M, the value C S1 of the series capacitor connected to the primary coil is
1 / C S1 ≈ (2π × f 0 ) 2 × L 1
Set the value C S2 of the series capacitor connected to the secondary coil to
1 / C S2 ≈ (2π × f 0 ) 2 × L 2
The frequency of the AC power supply is set to a frequency f Y that is different from f 0 and at which the output of the transformer becomes a constant voltage output for at least a part of the period during power feeding.
In this SS type non-contact power supply, the output of the secondary side is set by setting the frequency of the AC power supply of the transformer to a frequency f Y that satisfies F 11 ≠ 0 and F 12 = 0 in the F matrix of (Equation 3). Can be a constant voltage output.
また、本発明は、非接触給電システムにより二次電池を充電する二次電池の充電方法であって、一次コイルに直列に直列コンデンサCsを接続し、二次コイルに並列に並列コンデンサCpを接続し、交流電源の周波数がf0であるときの一次コイルの自己インダクタンスをL1、二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、並列コンデンサの値Cpを、
1/Cp≒(2π×f0)2×L2
に設定し、直列コンデンサの値Csを、
1/Cs≒(2π×f0)2×(L1−M2/L2)
に設定し、二次電池の電圧が所定電圧に達するまでは、交流電源の周波数を、f0と異なる周波数であって、トランスの出力が定電流出力となる周波数fXに設定し、二次電池の電圧が所定電圧に達した後は、交流電源の周波数をf0に設定することを特徴とする。
このように、SP方式を採る非接触給電トランスの交流電源の周波数を給電途中で変えるだけで、二次電池に対する定電流定電圧充電が可能になる。
The present invention also relates to a method for charging a secondary battery in which a secondary battery is charged by a non-contact power feeding system, wherein a series capacitor Cs is connected in series to the primary coil, and a parallel capacitor Cp is connected in parallel to the secondary coil. When the frequency of the AC power supply is f 0 , when the self-inductance of the primary coil is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M, the value Cp of the parallel capacitor is
1 / Cp≈ (2π × f 0 ) 2 × L 2
And set the series capacitor value Cs to
1 / Cs≈ (2π × f 0 ) 2 × (L 1 −M 2 / L 2 )
Until the voltage of the secondary battery reaches a predetermined voltage, the frequency of the AC power supply is set to a frequency f X that is different from f 0 and the transformer output is a constant current output. After the battery voltage reaches a predetermined voltage, the frequency of the AC power supply is set to f 0 .
In this way, the constant current and constant voltage charging of the secondary battery becomes possible only by changing the frequency of the AC power supply of the non-contact power supply transformer adopting the SP method during the power supply.
また、本発明は、非接触給電システムにより二次電池を充電する二次電池の充電方法であって、一次コイルに直列に直列コンデンサCS1を接続し、二次コイルに直列に直列コンデンサCS2を接続し、交流電源の周波数がf0であるときの一次コイルの自己インダクタンスをL1、二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、一次コイルに接続された直列コンデンサの値CS1を、
1/CS1≒(2π×f0)2×L1
に設定し、二次コイルに接続された直列コンデンサの値CS2を、
1/CS2≒(2π×f0)2×L2
に設定し、二次電池の電圧が所定電圧に達するまでは、交流電源の周波数をf0に設定し、二次電池の電圧が所定電圧に達した後は、f0と異なる周波数であって、トランスの出力が定電圧出力となる周波数fYに設定することを特徴とする。
このように、SS方式を採る非接触給電トランスの交流電源の周波数を給電途中で変えるだけで、二次電池に対する定電流定電圧充電が可能になる。
The present invention also relates to a method for charging a secondary battery in which a secondary battery is charged by a non-contact power feeding system, wherein a series capacitor C S1 is connected in series to the primary coil, and a series capacitor C S2 is connected in series to the secondary coil. When the frequency of the AC power supply is f 0 , the primary coil self-inductance is L 1 , the secondary coil self-inductance is L 2 , and the mutual inductance is M, and the series capacitor connected to the primary coil Value C S1 ,
1 / C S1 ≈ (2π × f 0 ) 2 × L 1
Set the value C S2 of the series capacitor connected to the secondary coil to
1 / C S2 ≈ (2π × f 0 ) 2 × L 2
The frequency of the AC power supply is set to f 0 until the voltage of the secondary battery reaches a predetermined voltage, and after the voltage of the secondary battery reaches the predetermined voltage, the frequency is different from f 0. The frequency f Y at which the output of the transformer becomes a constant voltage output is set.
As described above, the secondary battery can be charged with a constant current and a constant voltage only by changing the frequency of the AC power supply of the non-contact power supply transformer adopting the SS method during the power supply.
本発明により、非接触給電の出力を定電圧出力または定電流出力に簡単に切換えることができる。
また、この特性を利用して、二次電池の定電流定電圧充電を簡単に実施することができる。
According to the present invention, the output of non-contact power feeding can be easily switched to a constant voltage output or a constant current output.
Moreover, the constant current constant voltage charge of a secondary battery can be easily implemented using this characteristic.
図1は、本発明の実施形態に係るSP方式の非接触給電システム(a)、及び、SS方式の非接触給電システム(b)の回路構成を示している。
これらのシステムでは、インバータ44を構成するIGBTのスイッチングのタイミングを切換えてインバータ44から出力される交流の周波数を制御する周波数制御手段60を備えている。
これらの回路構成の簡易等価回路は、図8(a)(b)に示した回路になる。
FIG. 1 shows a circuit configuration of an SP-type non-contact power supply system (a) and an SS-type non-contact power supply system (b) according to an embodiment of the present invention.
These systems are provided with a frequency control means 60 for controlling the frequency of the alternating current output from the inverter 44 by switching the switching timing of the IGBT constituting the inverter 44.
The simple equivalent circuits having these circuit configurations are the circuits shown in FIGS.
SP方式の非接触給電システムでは、インバータ44の出力周波数がf0(=ω0/2π)であるときの一次コイル46の自己インダクタンスをL1、二次コイル47の自己インダクタンスをL2、相互インダクタンスをMとするとき、並列コンデンサ48の値Cpは、
(数1) 1/Cp=(2π×f0)2×L2
に設定され、直列コンデンサ45の値Csは、
(数2) 1/Cs=(2π×f0)2×(L1−M2/L2)
に設定される。
この場合、インバータ44の出力周波数がf0であれば、先に説明したように、(数3)のF行列のF12が0になり、二次側の出力が定電圧出力になる。
In the SP-type non-contact power supply system, when the output frequency of the inverter 44 is f 0 (= ω 0 / 2π), the self-inductance of the primary coil 46 is L 1 and the self-inductance of the secondary coil 47 is L 2 . When the inductance is M, the value Cp of the parallel capacitor 48 is
(Equation 1) 1 / Cp = (2π × f 0 ) 2 × L 2
The value Cs of the series capacitor 45 is
(Equation 2) 1 / Cs = (2π × f 0 ) 2 × (L 1 −M 2 / L 2 )
Set to
In this case, if the output frequency of the inverter 44 is f 0 , as described above, F 12 of the F matrix of (Equation 3) becomes 0, and the secondary output becomes a constant voltage output.
この回路では、周波数f0以外の周波数で駆動した場合に、(数3)のF行列のF11が0になる周波数fXが存在する。
fXは(数4)に(数5)を代入し、一般的な周波数fにおけるF行列を求めた後、周波数f0で(数1)(数2)を用いて決めたCS、CPの値を代入し、F11の値を0とする周波数fを求めることで導出できる。
ここでは、fX=f1(=ω1/2π)と置く。f1とf0の周波数比を、
f1/f0=αSP
とするとき、周波数f1でのF行列は、(数13)のようになる。
f X substitutes (Equation 5) into (Equation 4), obtains an F matrix at a general frequency f, and then determines C S and C determined using (Equation 1) and (Equation 2) at frequency f 0. It can be derived by substituting the value of P and obtaining the frequency f with the value of F 11 being zero.
Here, f X = f 1 (= ω 1 / 2π) is set. The frequency ratio between f 1 and f 0 is
f 1 / f 0 = α SP
, The F matrix at the frequency f 1 is as shown in (Equation 13).
この周波数f1は、結合係数kを、
k=M/(L1×L2)1/2
として、kのみを係数として含み、(αSP)2を変数yとする二次元方程式(数14)から求められる。
(数14) (1−k2)y2−(2−k2)y+1−k2=0
(数14)の解は、
y1={2−k2+k(4−3k2)1/2}/2(1−k2)
y2={2−k2−k(4−3k2)1/2}/2(1−k2)
の二つであり、求める周波数f1は、
f1=y1 1/2×f0
f1=y2 1/2×f0
となる。
交流電源の周波数がf1の場合、(数13)のF行列のF11が0であるため、二次側の出力は定電流出力になる。
This frequency f 1 represents the coupling coefficient k,
k = M / (L 1 × L 2 ) 1/2
As described above, it is obtained from a two-dimensional equation (Equation 14) including only k as a coefficient and (α SP ) 2 as a variable y.
(Number 14) (1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
The solution of (Equation 14) is
y 1 = {2-k 2 + k (4-3k 2 ) 1/2 } / 2 (1-k 2 )
y 2 = {2-k 2 -k (4-3k 2) 1/2} / 2 (1-k 2)
The required frequency f 1 is
f 1 = y 1 1/2 × f 0
f 1 = y 2 1/2 × f 0
It becomes.
When the frequency of the AC power supply is f 1 , F 11 in the F matrix of (Equation 13) is 0, so the secondary side output is a constant current output.
このように、このSP方式の非接触給電システムでは、周波数制御手段60が、定電圧駆動するインバータ44の出力周波数をf0に設定すると、非接触給電トランスの出力が定電圧出力になり、また、インバータ44の出力周波数をf1に設定すると、非接触給電トランスの出力が定電流出力になる。
そのため、SP方式の非接触給電システムにより二次電池を充電する場合、二次電池の電圧が所定電圧に達するまで、交流電源の周波数をf1に設定し、二次電池の電圧が所定電圧に達した後、交流電源の周波数をf0に維持することで定電流定電圧充電が可能になる。
Thus, in this SP-type non-contact power feeding system, when the frequency control means 60 sets the output frequency of the inverter 44 driven by constant voltage to f 0 , the output of the non-contact power feeding transformer becomes a constant voltage output, When the output frequency of the inverter 44 is set to f 1 , the output of the non-contact power supply transformer becomes a constant current output.
Therefore, when the secondary battery is charged by the SP-type non-contact power feeding system, the frequency of the AC power supply is set to f 1 until the voltage of the secondary battery reaches the predetermined voltage, and the voltage of the secondary battery is set to the predetermined voltage. Then, constant current constant voltage charging is possible by maintaining the frequency of the AC power supply at f 0 .
なお、SP方式の非接触給電システムでは、一次コイルの巻数がN1、二次コイルの巻数がN2、交流電源の周波数がf0のときの一次入力電圧がVIN、二次出力電圧がVLであるとき、トランスの結合係数kを、
k=c×(N2/N1)×(VIN/VL) (但し、cは一定の定数)
として求め、このkを用いて(数14)からy1及びy2を求めても良い。
In the SP-type non-contact power feeding system, the primary input voltage is V IN when the number of turns of the primary coil is N 1 , the number of turns of the secondary coil is N 2 , and the frequency of the AC power supply is f 0 , and the secondary output voltage is When V L , the transformer coupling coefficient k is
k = c × (N 2 / N 1 ) × (V IN / V L ) (where c is a constant)
And using this k, y 1 and y 2 may be obtained from (Equation 14).
一方、SS方式の非接触給電システムでは、インバータ44の出力周波数がf0(=ω0/2π)であるときの一次コイル46の自己インダクタンスをL1、二次コイル47の自己インダクタンスをL2、相互インダクタンスをMとするとき、一次コイル46に接続される直列コンデンサ55の値CS1は、
(数8) 1/CS1=(2π×f0)2×L1
に設定され、二次コイル47に接続された直列コンデンサ58の値CS2は、
(数9) 1/CS2=(2π×f0)2×L2
に設定される。
この場合、インバータ44の出力周波数がf0であれば、先に説明したように、(数3)のF行列のF11が0になり、二次側の出力が定電流出力になる。
On the other hand, in the SS type non-contact power feeding system, when the output frequency of the inverter 44 is f 0 (= ω 0 / 2π), the self-inductance of the primary coil 46 is L 1 and the self-inductance of the secondary coil 47 is L 2. When the mutual inductance is M, the value C S1 of the series capacitor 55 connected to the primary coil 46 is
(Equation 8) 1 / C S1 = (2π × f 0 ) 2 × L 1
And the value C S2 of the series capacitor 58 connected to the secondary coil 47 is
(Equation 9) 1 / C S2 = (2π × f 0 ) 2 × L 2
Set to
In this case, if the output frequency of the inverter 44 is f 0 , as described above, F 11 of the F matrix of (Equation 3) becomes 0, and the secondary output becomes a constant current output.
この回路では、周波数f0以外の周波数で駆動した場合に、(数3)のF行列のF12が0になる周波数fYが存在する。
fYは(数4)に(数10)を代入し、一般的な周波数fにおけるF行列を求めた後、周波数f0で(数8)(数9)を用いて決めたCS1、CS2の値を代入し、F12の値を0とする周波数fを求めることで導出できる。
ここでは、fY=f1(=ω1/2π)と置く。f1とf0の周波数比を、
f1/f0=αSS
とするとき、周波数f1でのF行列は、(数15)のようになる。
For f Y , (Equation 10) is substituted into (Equation 4) to obtain an F matrix at a general frequency f, and then C S1 and C C determined using (Equation 8) and (Equation 9) at frequency f 0. assigns the value of S2, the value of F 12 can be derived by obtaining the frequency f to be 0.
Here, f Y = f 1 (= ω 1 / 2π) is set. The frequency ratio between f 1 and f 0 is
f 1 / f 0 = α SS
Then, the F matrix at the frequency f 1 is as shown in (Expression 15).
この周波数f1は、結合係数kを、
k=M/(L1×L2)1/2
として、
f1=f0/(1+k)1/2
または、
f1=f0/(1−k)1/2
となる。
交流電源の周波数がf1の場合、(数15)のF行列のF12が0であるため、二次側の出力は定電圧出力になる。
This frequency f 1 represents the coupling coefficient k,
k = M / (L 1 × L 2 ) 1/2
As
f 1 = f 0 / (1 + k) 1/2
Or
f 1 = f 0 / (1-k) 1/2
It becomes.
When the frequency of the AC power supply is f 1 , F 12 in the F matrix of (Equation 15) is 0, so the output on the secondary side is a constant voltage output.
このように、SS方式の非接触給電システムでは、周波数制御手段60が、定電圧駆動するインバータ44の出力周波数をf0に設定すると、非接触給電トランスの出力が定電流出力になり、また、インバータ44の出力周波数をf1に設定すると、非接触給電トランスの出力が定電圧出力になる。
そのため、SS方式の非接触給電システムで二次電池を充電する場合、二次電池の電圧が所定電圧に達するまで、交流電源の周波数をf0に設定し、二次電池の電圧が所定電圧に達した後、交流電源の周波数をf1に維持することで定電流定電圧充電が可能になる。
Thus, in the SS type non-contact power supply system, when the frequency control means 60 sets the output frequency of the inverter 44 driven by constant voltage to f 0 , the output of the non-contact power supply transformer becomes a constant current output, When the output frequency of the inverter 44 is set to f 1, the output of the contactless power supply transformer is a constant voltage output.
Therefore, when charging a secondary battery with an SS-type non-contact power supply system, the frequency of the AC power supply is set to f 0 until the voltage of the secondary battery reaches a predetermined voltage, and the voltage of the secondary battery is set to the predetermined voltage. Then, constant current and constant voltage charging becomes possible by maintaining the frequency of the AC power supply at f 1 .
次に、本発明を検証した実験結果について説明する。
図2は、給電実験を行ったSP方式の回路を示し、その定数を図3に示している。r1、r2は一次コイル、二次コイルの各抵抗を示している。
駆動周波数は、f0=100kHz、f1=68.5kHz、145kHzとしている。
図4は、トランス入力電圧を一定に保ち、負荷抵抗RBを14Ω、28Ω、56Ωに変えたときの各部の電圧、電流、電力PB及び給電効率ηと駆動周波数との関係を示している。
駆動周波数がf0=100kHzの場合、負荷抵抗RBが変化しても負荷電圧VLが略一定であり、定電圧出力特性が確認できる。また、駆動周波数がf1=68.5kHz及び145kHzの場合、負荷抵抗RBが変化しても負荷電流ILが略一定であり、定電流出力特性が確認できる。
Next, experimental results for verifying the present invention will be described.
FIG. 2 shows an SP system circuit in which a power feeding experiment was performed, and constants thereof are shown in FIG. r 1 and r 2 indicate the resistances of the primary coil and the secondary coil.
The drive frequencies are set to f 0 = 100 kHz, f 1 = 68.5 kHz, and 145 kHz.
4, keep the transformer input voltage constant, shows 14Ω load resistor R B, 28Ω, each part of the voltage when changing the 56Omu, current, the relationship between the power P B and power supply efficiency η and drive frequency .
If the driving frequency is f 0 = 100kHz, the load resistance R B is also vary the load voltage V L is substantially constant, a constant voltage output characteristics can be confirmed. When the drive frequency is f 1 = 68.5 kHz and 145 kHz, the load current I L is substantially constant even when the load resistance R B changes, and the constant current output characteristics can be confirmed.
図5は、トランス入力インピーダンスZINの周波数特性を示している。|ZIN|は、定電圧出力となるf0=100kHzにおいて極大となり、定電流出力となるf1=68.5kHz及び145kHzにおいて極小となる。
図5から、SP方式の非接触給電では、駆動周波数をトランス入力インピーダンスの山部に設定すれば、トランス出力が定電圧出力となり、谷部に設定すれば、トランス出力が定電流出力になることが分かる。
Figure 5 shows the frequency characteristic of the transformer input impedance Z IN. | Z IN | becomes maximum at f 0 = 100 kHz, which is a constant voltage output, and becomes minimum at f 1 = 68.5 kHz and 145 kHz, which are constant current outputs.
From FIG. 5, in the SP-type non-contact power feeding, if the driving frequency is set to the peak of the transformer input impedance, the transformer output becomes a constant voltage output, and if the driving frequency is set to the valley, the transformer output becomes a constant current output. I understand.
また、図6は、別の非接触給電トランスでSS方式の給電シミュレーションを行った結果を示している。
駆動周波数は、f0=85kHz、f1=77.8kHz、95kHzとしている。
駆動周波数f0=85kHzの場合は、インバータ出力電圧を一定(VIN=166V)に保ち、負荷抵抗RBを4.6Ω、9.2Ω及び18.4Ωに変えても、負荷電流ILはほぼ20Aで一定しており、定電流出力特性が確認できる。
また、駆動周波数を、定電圧出力特性を示す駆動周波数のf1=77.8kHz、95kHzに設定して、負荷抵抗RBを4.6Ω、9.2Ω及び18.4Ωに変えた場合は、負荷電圧VLが約160Vで一定しており、定電圧出力特性が確認できる。いずれの場合も給電効率ηは高く実用上問題はない。
FIG. 6 shows a result of performing a power supply simulation of the SS system with another contactless power supply transformer.
The drive frequencies are set to f 0 = 85 kHz, f 1 = 77.8 kHz, and 95 kHz.
When the drive frequency f 0 = 85 kHz, even if the inverter output voltage is kept constant (V IN = 166 V) and the load resistance R B is changed to 4.6Ω, 9.2Ω and 18.4Ω, the load current I L is It is constant at about 20 A, and constant current output characteristics can be confirmed.
Further, when the drive frequency is set to f 1 = 77.8 kHz and 95 kHz of the drive frequency showing the constant voltage output characteristics, and the load resistance R B is changed to 4.6Ω, 9.2Ω and 18.4Ω, The load voltage V L is constant at about 160 V, and constant voltage output characteristics can be confirmed. In either case, the power supply efficiency η is high and there is no practical problem.
このように、この非接触給電システムでは、電源周波数の変更だけで、出力側を定電圧駆動から定電流駆動に変更可能であり、充電制御を大幅に簡略化できる。
なお、ここでは、CS、CP、CS1、CS2、f1及びkを求めるための等式を示しているが、本発明の実施に際しては、それらの値が、等式から得られる値から多少ずれていても実際上支障がない。
また、ここでは、kの値を用いてf1を算出する例を示したが、厳密なトランス定数を用いてf1を決定しても良い。
また、二次電池の充電に当たり、二次電池の電圧を検出して周波数制御手段に伝える検出手段を追加し、周波数制御手段が、検出手段の検出結果に基づいて駆動周波数の切換えを行うようにしても良い。
Thus, in this non-contact power supply system, the output side can be changed from constant voltage drive to constant current drive only by changing the power supply frequency, and the charge control can be greatly simplified.
Here, equations for determining C S , C P , C S1 , C S2 , f 1, and k are shown, but in the practice of the present invention, these values are obtained from the equations. Even if it deviates slightly from the value, there is practically no problem.
Here, an example is shown in which f 1 is calculated using the value of k, but f 1 may be determined using a strict transformer constant.
In addition, when charging the secondary battery, detection means for detecting the voltage of the secondary battery and transmitting it to the frequency control means is added, and the frequency control means switches the drive frequency based on the detection result of the detection means. May be.
本発明の非接触給電システムは、トランス出力を定電流出力から定電圧出力に切換えたり、その逆に切換えたりすることが簡単に実行可能であり、各種の充電方式を採る二次電池や電気二重層キャパシタ等を充電するために広く用いることができる。 The contactless power feeding system of the present invention can easily switch the transformer output from the constant current output to the constant voltage output or vice versa, and can be used for a secondary battery or an electric battery that employs various charging methods. It can be widely used to charge multilayer capacitors and the like.
41 商用電源
42 直流供給部
43 平滑コンデンサ
44 インバータ
45 一次側直列コンデンサ
46 一次コイル(送電コイル)
47 二次コイル(受電コイル)
48 二次側並列コンデンサ
49 整流回路
50 平滑コンデンサ
51 二次電池
55 一次側直列コンデンサ
58 二次側直列コンデンサ
60 周波数制御手段
41 Commercial power supply 42 DC supply unit 43 Smoothing capacitor 44 Inverter 45 Primary side series capacitor 46 Primary coil (power transmission coil)
47 Secondary coil (Receiving coil)
48 Secondary side parallel capacitor 49 Rectifier circuit 50 Smoothing capacitor 51 Secondary battery 55 Primary side series capacitor 58 Secondary side series capacitor 60 Frequency control means
Claims (19)
前記一次コイルに直列に接続された直列コンデンサCsと、
前記二次コイルに並列に接続された並列コンデンサCpと、
前記交流電源の周波数を制御する周波数制御手段と、
を備え、
前記交流電源の周波数がf0であるときの前記一次コイルの自己インダクタンスをL1、前記二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、
前記並列コンデンサの値Cpが、
1/Cp≒(2π×f0)2×L2
に設定され、前記直列コンデンサの値Csが、
1/Cs≒(2π×f0)2×(L1−M2/L2)
に設定され、
給電中の少なくとも一部期間に亘り、前記交流電源の周波数が、前記周波数制御手段により、前記f0と異なる周波数であって、前記トランスの出力が定電流出力となる周波数fXに設定されることを特徴とする非接触給電システム。 A non-contact power feeding system that includes a transformer composed of a primary coil and a secondary coil that are spaced apart from each other, and in which power is fed from the primary coil driven by an AC power source to the secondary coil by electromagnetic induction. Because
A series capacitor Cs connected in series to the primary coil;
A parallel capacitor Cp connected in parallel to the secondary coil;
Frequency control means for controlling the frequency of the AC power supply;
With
When the self-inductance of the primary coil when the frequency of the AC power supply is f 0 is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M,
The value Cp of the parallel capacitor is
1 / Cp≈ (2π × f 0 ) 2 × L 2
And the value Cs of the series capacitor is
1 / Cs≈ (2π × f 0 ) 2 × (L 1 −M 2 / L 2 )
Set to
The frequency of the AC power source is set to a frequency different from f 0 by the frequency control means and to a frequency f X at which the output of the transformer becomes a constant current output over at least a part of the period during power feeding. A non-contact power feeding system characterized by that.
k=M/(L1×L2)1/2
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求め、
前記fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
に設定することを特徴とする非接触給電システム。 The contactless power feeding system according to claim 1 or 2, wherein a coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
Find different positive values y 1 and y 2 that satisfy
F X
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
A non-contact power feeding system characterized by being set to.
k≒c×(N2/N1)×(VIN/VL) (但し、cは一定の定数)
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求め、
前記fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
に設定することを特徴とする非接触給電システム。 3. The non-contact power feeding system according to claim 1, wherein the number of turns of the primary coil is N 1 , the number of turns of the secondary coil is N 2, and the primary input when the frequency of the AC power supply is f 0. When the voltage is V IN and the secondary output voltage is V L , the transformer coupling coefficient is
k≈c × (N 2 / N 1 ) × (V IN / V L ) (where c is a constant)
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
Find different positive values y 1 and y 2 that satisfy
F X
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
A non-contact power feeding system characterized by being set to.
前記一次コイルに直列に接続された直列コンデンサCS1と、
前記二次コイルに直列に接続された直列コンデンサCS2と、
前記交流電源の周波数を制御する周波数制御手段と、
を備え、
前記交流電源の周波数がf0であるときの前記一次コイルの自己インダクタンスをL1、前記二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、
前記一次コイルに接続された直列コンデンサの値CS1が、
1/CS1≒(2π×f0)2×L1
に設定され、前記二次コイルに接続された直列コンデンサの値CS2が、
1/CS2≒(2π×f0)2×L2
に設定され、
給電中の少なくとも一部期間に亘り、前記交流電源の周波数が、前記周波数制御手段により、前記f0と異なる周波数であって、前記トランスの出力が定電圧出力となる周波数fYに設定されることを特徴とする非接触給電システム。 A non-contact power feeding system that includes a transformer composed of a primary coil and a secondary coil that are spaced apart from each other, and in which power is fed from the primary coil driven by an AC power source to the secondary coil by electromagnetic induction. Because
A series capacitor C S1 connected in series to the primary coil;
A series capacitor C S2 connected in series to the secondary coil;
Frequency control means for controlling the frequency of the AC power supply;
With
When the self-inductance of the primary coil when the frequency of the AC power supply is f 0 is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M,
The value C S1 of the series capacitor connected to the primary coil is
1 / C S1 ≈ (2π × f 0 ) 2 × L 1
And the value C S2 of the series capacitor connected to the secondary coil is
1 / C S2 ≈ (2π × f 0 ) 2 × L 2
Set to
The frequency of the AC power supply is set to a frequency f Y different from the frequency f 0 by the frequency control means and at a frequency f Y at which the output of the transformer becomes a constant voltage output for at least a part of the period during power feeding. A non-contact power feeding system characterized by that.
k=M/(L1×L2)1/2
として、
前記fYを、
fY≒f0/(1+k)1/2
または、
fY≒f0/(1−k)1/2
に設定することを特徴とする非接触給電システム。 The contactless power supply system according to claim 5 or 6, wherein a coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As
F Y
f Y ≒ f 0 / (1 + k) 1/2
Or
f Y ≒ f 0 / (1-k) 1/2
A non-contact power feeding system characterized by being set to.
前記一次コイルに直列に直列コンデンサCsを接続し、
前記二次コイルに並列に並列コンデンサCpを接続し、
前記交流電源の周波数がf0であるときの前記一次コイルの自己インダクタンスをL1、前記二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、
前記並列コンデンサの値Cpを、
1/Cp≒(2π×f0)2×L2
に設定し、前記直列コンデンサの値Csを、
1/Cs≒(2π×f0)2×(L1−M2/L2)
に設定し、
給電中の少なくとも一部期間に亘り、前記交流電源の周波数を、前記f0と異なる周波数であって、前記トランスの出力が定電流出力となる周波数fXに設定することを特徴とする非接触給電方法。 Electric power is supplied to the secondary coil by electromagnetic induction from the primary coil driven by an AC power supply by a non-contact power supply system equipped with a transformer composed of a primary coil and a secondary coil spaced apart from each other. A non-contact power feeding method
A series capacitor Cs is connected in series to the primary coil;
A parallel capacitor Cp is connected in parallel to the secondary coil;
When the self-inductance of the primary coil when the frequency of the AC power supply is f 0 is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M,
The value Cp of the parallel capacitor is
1 / Cp≈ (2π × f 0 ) 2 × L 2
And the series capacitor value Cs is
1 / Cs≈ (2π × f 0 ) 2 × (L 1 −M 2 / L 2 )
Set to
The non-contact frequency characteristic is that the frequency of the AC power supply is set to a frequency f X that is different from f 0 and at which the output of the transformer becomes a constant current output for at least a part of the period during power feeding. Power supply method.
k=M/(L1×L2)1/2
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求め、
前記fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
に設定することを特徴とする非接触給電方法。 The contactless power feeding method according to claim 8 or 9, wherein a coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
Find different positive values y 1 and y 2 that satisfy
F X
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
A non-contact power feeding method, characterized in that:
k≒c×(N2/N1)×(VIN/VL) (但し、cは一定の定数)
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求め、
前記fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
に設定することを特徴とする非接触給電方法。 10. The contactless power feeding method according to claim 8, wherein the number of turns of the primary coil is N 1 , the number of turns of the secondary coil is N 2, and the frequency of the AC power source is f 0. When the primary input voltage when the frequency of the power supply is f 0 is V IN and the secondary output voltage is V L , the coupling coefficient of the transformer is
k≈c × (N 2 / N 1 ) × (V IN / V L ) (where c is a constant)
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
Find different positive values y 1 and y 2 that satisfy
F X
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
A non-contact power feeding method, characterized in that:
前記一次コイルに直列に直列コンデンサCS1を接続し、
前記二次コイルに直列に直列コンデンサCS2を接続し、
前記交流電源の周波数がf0であるときの前記一次コイルの自己インダクタンスをL1、前記二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、
前記一次コイルに接続された直列コンデンサの値CS1を、
1/CS1≒(2π×f0)2×L1
に設定し、前記二次コイルに接続された直列コンデンサの値CS2を、
1/CS2≒(2π×f0)2×L2
に設定し、
給電中の少なくとも一部期間に亘り、前記交流電源の周波数を、前記f0と異なる周波数であって、前記トランスの出力が定電圧出力となる周波数fYに設定することを特徴とする非接触給電方法。 Electric power is supplied to the secondary coil by electromagnetic induction from the primary coil driven by an AC power supply by a non-contact power supply system equipped with a transformer composed of a primary coil and a secondary coil spaced apart from each other. A non-contact power feeding method
A series capacitor C S1 is connected in series with the primary coil,
A series capacitor C S2 is connected in series with the secondary coil,
When the self-inductance of the primary coil when the frequency of the AC power supply is f 0 is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M,
The value C S1 of the series capacitor connected to the primary coil is
1 / C S1 ≈ (2π × f 0 ) 2 × L 1
The value C S2 of the series capacitor connected to the secondary coil is set to
1 / C S2 ≈ (2π × f 0 ) 2 × L 2
Set to
A non-contact method is characterized in that the frequency of the AC power supply is set to a frequency f Y that is different from the frequency f 0 and at which the output of the transformer becomes a constant voltage output for at least a part of the period during power feeding. Power supply method.
k=M/(L1×L2)1/2
として、
前記fYを、
fY≒f0/(1+k)1/2
または、
fY≒f0/(1−k)1/2
に設定することを特徴とする非接触給電方法。 The contactless power feeding method according to claim 12 or 13, wherein a coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As
F Y
f Y ≒ f 0 / (1 + k) 1/2
Or
f Y ≒ f 0 / (1-k) 1/2
A non-contact power feeding method, characterized in that:
前記一次コイルに直列に直列コンデンサCsを接続し、
前記二次コイルに並列に並列コンデンサCpを接続し、
前記交流電源の周波数がf0であるときの前記一次コイルの自己インダクタンスをL1、前記二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、
前記並列コンデンサの値Cpを、
1/Cp≒(2π×f0)2×L2
に設定し、前記直列コンデンサの値Csを、
1/Cs≒(2π×f0)2×(L1−M2/L2)
に設定し、
前記二次電池の電圧が所定電圧に達するまでは、前記交流電源の周波数を、前記f0と異なる周波数であって、前記トランスの出力が定電流出力となる周波数fXに設定し、前記二次電池の電圧が所定電圧に達した後は、前記交流電源の周波数をf0に設定することを特徴とする二次電池の充電方法。 Electric power is supplied to the secondary coil by electromagnetic induction from the primary coil driven by an AC power supply by a non-contact power supply system equipped with a transformer composed of a primary coil and a secondary coil spaced apart from each other. And a secondary battery charging method for charging the secondary battery,
A series capacitor Cs is connected in series to the primary coil;
A parallel capacitor Cp is connected in parallel to the secondary coil;
When the self-inductance of the primary coil when the frequency of the AC power supply is f 0 is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M,
The value Cp of the parallel capacitor is
1 / Cp≈ (2π × f 0 ) 2 × L 2
And the series capacitor value Cs is
1 / Cs≈ (2π × f 0 ) 2 × (L 1 −M 2 / L 2 )
Set to
Until the voltage of the secondary battery reaches a predetermined voltage, the frequency of the AC power supply is set to a frequency f X that is a frequency different from f 0 and the output of the transformer is a constant current output. The secondary battery charging method, wherein the frequency of the AC power supply is set to f 0 after the voltage of the secondary battery reaches a predetermined voltage.
k=M/(L1×L2)1/2
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求め、
前記fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
に設定することを特徴とする二次電池の充電方法。 The secondary battery charging method according to claim 15, wherein a coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
Find different positive values y 1 and y 2 that satisfy
F X
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
A charging method for a secondary battery, characterized in that:
k≒c×(N2/N1)×(VIN/VL) (但し、cは一定の定数)
として、
(1−k2)y2−(2−k2)y+1−k2=0
を満たす異なる正の値y1、y2を求め、
前記fXを、
fX≒y1 1/2×f0
または、
fX≒y2 1/2×f0
に設定することを特徴とする二次電池の充電方法。 A method of charging a secondary battery according to claim 15, wherein the exchange of the number of turns of the primary coil N 1, the number of turns of the secondary coil and N 2, when the frequency of the AC power source is f 0 When the primary input voltage when the frequency of the power supply is f 0 is V IN and the secondary output voltage is V L , the coupling coefficient of the transformer is
k≈c × (N 2 / N 1 ) × (V IN / V L ) (where c is a constant)
As
(1-k 2) y 2 - (2-k 2) y + 1-k 2 = 0
Find different positive values y 1 and y 2 that satisfy
F X
f X ≒ y 1 1/2 × f 0
Or
f X ≒ y 2 1/2 × f 0
A charging method for a secondary battery, characterized in that:
前記一次コイルに直列に直列コンデンサCS1を接続し、
前記二次コイルに直列に直列コンデンサCS2を接続し、
前記交流電源の周波数がf0であるときの前記一次コイルの自己インダクタンスをL1、前記二次コイルの自己インダクタンスをL2、相互インダクタンスをMとするとき、
前記一次コイルに接続された直列コンデンサの値CS1を、
1/CS1≒(2π×f0)2×L1
に設定し、前記二次コイルに接続された直列コンデンサの値CS2を、
1/CS2≒(2π×f0)2×L2
に設定し、
前記二次電池の電圧が所定電圧に達するまでは、前記交流電源の周波数を、前記f0に設定し、前記二次電池の電圧が所定電圧に達した後は、前記f0と異なる周波数であって、前記トランスの出力が定電圧出力となる周波数fYに設定することを特徴とする二次電池の充電方法。 Electric power is supplied to the secondary coil by electromagnetic induction from the primary coil driven by an AC power supply by a non-contact power supply system equipped with a transformer composed of a primary coil and a secondary coil spaced apart from each other. And a secondary battery charging method for charging the secondary battery,
A series capacitor C S1 is connected in series with the primary coil,
A series capacitor C S2 is connected in series with the secondary coil,
When the self-inductance of the primary coil when the frequency of the AC power supply is f 0 is L 1 , the self-inductance of the secondary coil is L 2 , and the mutual inductance is M,
The value C S1 of the series capacitor connected to the primary coil is
1 / C S1 ≈ (2π × f 0 ) 2 × L 1
The value C S2 of the series capacitor connected to the secondary coil is set to
1 / C S2 ≈ (2π × f 0 ) 2 × L 2
Set to
Until the voltage of the secondary battery reaches a predetermined voltage, the frequency of the alternating current power supply, and set the f 0, after the voltage of the secondary battery reaches a predetermined voltage, and at a different frequency the f 0 A method for charging a secondary battery, wherein the output of the transformer is set to a frequency f Y at which a constant voltage output is obtained.
k=M/(L1×L2)1/2
として、
前記fYを、
fY≒f0/(1+k)1/2
または、
fY≒f0/(1−k)1/2
に設定することを特徴とする二次電池の充電方法。 The method of charging a secondary battery according to claim 18, wherein the coupling coefficient of the transformer is
k = M / (L 1 × L 2 ) 1/2
As
F Y
f Y ≒ f 0 / (1 + k) 1/2
Or
f Y ≒ f 0 / (1-k) 1/2
A charging method for a secondary battery, characterized in that:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014020293A JP6269939B2 (en) | 2014-02-05 | 2014-02-05 | Non-contact power supply system, non-contact power supply method, and secondary battery charging method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014020293A JP6269939B2 (en) | 2014-02-05 | 2014-02-05 | Non-contact power supply system, non-contact power supply method, and secondary battery charging method |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2015149803A JP2015149803A (en) | 2015-08-20 |
JP6269939B2 true JP6269939B2 (en) | 2018-01-31 |
Family
ID=53892772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014020293A Active JP6269939B2 (en) | 2014-02-05 | 2014-02-05 | Non-contact power supply system, non-contact power supply method, and secondary battery charging method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP6269939B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109474081A (en) * | 2018-09-06 | 2019-03-15 | 西安理工大学 | Based on radio energy transmission system constant current-constant voltage output characteristic charging method |
CN110429716A (en) * | 2019-08-02 | 2019-11-08 | 西南交通大学 | A kind of variable element and Frequency constant current constant voltage induction type radio energy transmission system |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017051074A (en) * | 2015-09-04 | 2017-03-09 | 株式会社ダイヘン | Non-contact power transmission device and non-contact power supply system |
JP6699883B2 (en) * | 2016-02-12 | 2020-05-27 | 株式会社ダイヘン | Non-contact power transmission system and power transmission device |
JP6904280B2 (en) * | 2018-03-06 | 2021-07-14 | オムロン株式会社 | Non-contact power supply device |
KR102569722B1 (en) | 2018-07-09 | 2023-08-23 | 삼성전자주식회사 | Electronic apparatus |
JP7205169B2 (en) | 2018-11-01 | 2023-01-17 | オムロン株式会社 | Contactless power supply |
JP2020195223A (en) * | 2019-05-29 | 2020-12-03 | 長野日本無線株式会社 | Non-contact power supply system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08265986A (en) * | 1995-03-20 | 1996-10-11 | Sumitomo Electric Ind Ltd | Inductive charging method |
JP4379622B2 (en) * | 2005-12-28 | 2009-12-09 | 寿一 入江 | Immitance converter |
JP5592124B2 (en) * | 2010-02-23 | 2014-09-17 | 国立大学法人埼玉大学 | Non-contact power feeding device |
JP2013212034A (en) * | 2012-03-30 | 2013-10-10 | Equos Research Co Ltd | Power transmission system |
-
2014
- 2014-02-05 JP JP2014020293A patent/JP6269939B2/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109474081A (en) * | 2018-09-06 | 2019-03-15 | 西安理工大学 | Based on radio energy transmission system constant current-constant voltage output characteristic charging method |
CN109474081B (en) * | 2018-09-06 | 2021-07-20 | 西安理工大学 | Charging method based on constant current-constant voltage output characteristic of wireless power transmission system |
CN110429716A (en) * | 2019-08-02 | 2019-11-08 | 西南交通大学 | A kind of variable element and Frequency constant current constant voltage induction type radio energy transmission system |
CN110429716B (en) * | 2019-08-02 | 2020-11-24 | 西南交通大学 | Variable-parameter and variable-frequency constant-current constant-voltage induction type wireless power transmission system |
Also Published As
Publication number | Publication date |
---|---|
JP2015149803A (en) | 2015-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6269939B2 (en) | Non-contact power supply system, non-contact power supply method, and secondary battery charging method | |
JP6497614B2 (en) | Power transmission device and wireless power transmission system | |
CA2932518C (en) | Non-contact electric power transmitting device and electric power transfer system | |
US9981565B2 (en) | Impedance control device and vehicular non-contact power receiving device | |
JP6135471B2 (en) | Power transmission device and wireless power transmission system using the same | |
WO2015182335A1 (en) | Contactless power-supplying system, power-receiving device, and power-transmitting device | |
JP2014143814A (en) | Non-contact charging device and charging method | |
CN102801328A (en) | Power supply apparatus | |
JP2013062895A (en) | Device and system for power transmission | |
TW201310848A (en) | Wireless power receiving and supplying apparatus, wireless power supply system and auto-adjusting assistant circuit | |
KR20100092741A (en) | Contactless power transfer | |
US9312778B2 (en) | Power supply device | |
EP3197016A1 (en) | Power reception device, non-contact power transmission system, and charging method | |
KR20150076001A (en) | Capacitively coupled Wireless Charging Apparatus | |
JP5888468B2 (en) | Power feeding device and non-contact power feeding system | |
WO2015033860A1 (en) | Power transmission device, wireless power transmission system, and power transmission discrimination method | |
JP2014217245A (en) | Power-feeding system and resonance circuit | |
JP2017060328A (en) | Non-contact power reception device and power transmission system | |
JP6111625B2 (en) | Wireless power transmission equipment | |
JPWO2015151709A1 (en) | Power receiving apparatus, control method therefor, and power feeding system | |
US20220190647A1 (en) | Power transmitting device and wireless power transmission system | |
JP6579064B2 (en) | Power transmission device and power transmission system | |
Nutwong et al. | Load monitoring and output voltage control for SP topology IPT system using a single-side controller without any output measurement | |
JP2017539194A (en) | Induction power receiver | |
JP2016092959A (en) | Power transmission equipment and contactless power transmission device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20170203 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20171127 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20171205 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6269939 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |