System for contactless energy and data transfer

• US 9,893,570 B2
• Filed: 01/28/2016
• Issued: 02/13/2018
• Est. Priority Date: 01/29/2015
• Status: Active Grant

• Current Assignee: Balluff Verwaltungsges mbH
• Original Assignee: Balluff Verwaltungsges mbH
• Inventors: Beyer, Matthias, Senn, Stephan, Kayser, Fabian
• Primary Examiner(s): Deberadinis, Robert
• Application Number:
  US15/008,553
• Publication Number:
  US 20160226317A1
• Time in Patent Office: 747 Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation

Abstract

A system for contactless energy and data transfer has mobile and base parts. The mobile part contains a mobile part transmitter/receiver device transmitting and receiving a data signal, a mobile part transceiver and a current supply having a mobile part resonant circuit receiving an energy signal. The base part contains a base part resonant circuit for emitting the energy signal from an energy signal generator to provide a supply voltage to the current supply, a base part transmitter/receiver device receiving and transmitting the data signal, a base part transceiver, and a pulse width modulator. An impulse width modulator provides the pulse width-modulated signal which cyclically operates the energy signal generator to emit the energy signal in pulse bundles. A parameter specification provides a control signal setting at least one parameter of the pulse width-modulated signal to a value where sufficient energy transfer occurs to provide the supply voltage.

Claims

1. System for contactless energy and data transfer, having a mobile part (12) which contains a mobile part transmitter/receiver device (30) to transmit and receive a data signal (18), a mobile part transceiver (32) and having a current supply (36) which contains a mobile part resonant circuit (Lm, Cm) to receive an energy signal (22),

having a base part (14) which contains a base part resonant circuit (Lb, Cb), via which the base part (14) emits the energy signal (22) provided by an energy signal generator (42), from which energy signal (22) the current supply (36) of the mobile part (12) obtains a supply voltage (Ub),

wherein the base part (14) furthermore contains a base part transmitter/receiver device (40) to receive and transmit the data signal (18) and a base part transceiver (44),

wherein

the base part (14) contains a pulse width modulator (48), the provision of a pulse-width modulated signal (56) is provided by the pulse width modulator (48), a cyclic operation of the energy signal generator (42) is provided with the pulse width-modulated signal (56) such that an emission of the energy signal (22) is provided in pulse bundles (60), and a parameter specification (50) is provided which provides a control signal (54) which sets at least one parameter (PD, PB, PRT, V, TV) of the pulse width-modulated signal (56), wherein the at least one parameter (PD, PB, PRT, V, TV) is set to a value at which a sufficient energy transfer occurs for the provision of the supply voltage (Ub) in the mobile part (12).

2. System for contactless energy and data transfer according to claim 1, wherein the value to which the parameter (PD, PB, PRT, V, TV) is set is predetermined in a fixed manner.

3. System for contactless energy and data transfer according to claim 1, wherein the base part transceiver (44) determines a detection signal (52) in the case of a non-received data signal (18) and the parameter specification (50) is provided, and wherein the parameter determination (50) sets the at least one parameter (PD, PB, V, TV, PRT) of the pulse width-modulated signal (56) depending on an occurrence of the detection signal (52) in such a way that the energy of the emitted energy signal (22) is set to a minimum value at which the detection signal (52) is still present.

4. System for contactless energy and data transfer according to claim 1, wherein the ratio (V) of pulse duration (PD) to pulse break (PB) is provided as a parameter of the pulse width-modulated signal (56) and wherein the ratio (V) of pulse duration (PD) to pulse break (PB) is set to a minimum value at which a sufficient energy occurs for the provision of the supply voltage (Ub) in the mobile part (12).

5. System for contactless energy and data transfer according to claim 1, wherein the pulse duration (PD) is provided as a parameter of the pulse width-modulated signal (56), wherein the pulse duration (PD) is predetermined in a variable manner and the pulse break (PB) is predetermined in a fixed manner, and wherein the pulse duration (PD) is set to a minimum value at which a sufficient energy occurs for the provision of the supply voltage (Ub) in the mobile part (12).

6. System for contactless energy and data transfer according to claim 1, wherein the pulse break (PB) is provided as a parameter of the pulse width-modulated signal (56), wherein the pulse break (PB) is predetermined in a variable manner and the pulse duration (PD) is predetermined in a fixed manner, and wherein the pulse break (PB) is set to a maximum value at which a sufficient energy occurs for the provision of the supply voltage (Ub) in the mobile part (12).

7. System for contactless energy and data transfer according to claim 1, wherein the duty cycle (TV) is provided as a parameter of the pulse width-modulated signal (56), and wherein the duty cycle (TV) is set to a minimum value at which a sufficient energy occurs for the provision of the supply voltage (Ub) in the mobile part (12).

8. System for contactless energy and data transfer according to claim 1, wherein the period duration (PRT) of the pulse width-modulated signal (56) is provided as a parameter of the pulse width-modulated signal (56), and wherein the period duration (PRT) is set to a maximum value at which a sufficient energy occurs for the provision of the supply voltage (Ub) in the mobile part (12).

9. System for contactless energy and data transfer according to claim 1, wherein a mobile part resonant circuit (Lm, Cm) and a buffer capacitor (Cp) are provided in the current supply (36) of the mobile part (12).

10. System for contactless energy and data transfer according to claim 1, wherein the mobile part transmitter/receiver device (30) and the base part transmitter/receiver device (40) are each able to be implemented as opto-electronic transmitter/receiver devices.

11. System for contactless energy and data transfer according to claim 1, wherein the mobile part transmitter/receiver device (30) and the base part transmitter/receiver device (40) are each implemented as a coil.