System and method for coded communication signals regulating inductive power transmissions

• US 10,680,469 B2
• Filed: 08/02/2018
• Issued: 06/09/2020
• Est. Priority Date: 07/02/2008
• Status: Active Grant

• Current Assignee: Powermat Technologies, Ltd.
• Original Assignee: Powermat Technologies, Ltd.
• Inventors: Azancot, Yossi, Rofe, Arik, Greenwald, Oola, Ben-Shalom, Amir, Asheri, Moti, Leibovitz, Alfred
• Primary Examiner(s): Cavallari, Daniel J
• Application Number:
  US16/053,126
• Publication Number:
  US 20180342908A1
• Time in Patent Office: 677 Days
• CPC Class Codes: H01F 2038/143 for signals
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02M 3/3376 with automatic control of output voltage or current
• CPC Class Codes: H02M 7/4815 Resonant converters H02M7/4811 and H02M7/4826 take precedence
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

An inductive power outlet for wirelessly powering a power receiver is presented that comprises a voltage peak detector that is configured to detect voltage changes that are indicative of increase in a system resonant frequency. The inductive power outlet is configured to respond to detected voltage changes by shutting down or issuing a warning, and the voltage peak detector is further used to detect communication signals initiated by the power receiver to the power outlet.

Claims

1. An inductive power outlet, having a primary inductor, for wirelessly powering a power receiver, the inductive power outlet comprising:

a signal receiving circuit comprising;

a peak detector configured to detect voltage, current peaks, or voltage and current peaks in the primary inductor; and

a processor having a demodulator, the demodulator configured to determine frequencies of the peaks,

wherein the power outlet is configured to either shut down or issue a warning indicating hazardous scenario if a peak of the peaks exceeds a normal operating voltage by the peak detector, and wherein the processor is configured to detect signals of the power receiver based on the frequencies.

2. The inductive power outlet of claim 1, wherein the signal receiving circuit is configured to produce an output signal that corresponds to the signals of the power receiver, wherein the signals comprise information about the power receiver.