# US 2024/0204567 A1 · Electric Apparatus of and Electric Method for Electric Machine

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- Number: US 2024/0204567 A1
- Document ID: US20240204567A1
- Status: Published application
- Kind: A1
- Application number: 18/537,080
- Filed: 2023-12-12
- Published: 2024-06-20
- Earliest claimed: 2022-12-16
- Assignees: ABB Schweiz AG
- Applicants: ABB Schweiz AG
- Inventors: Alex Danci; Jouni Ikäheimo
- Web page: https://patentgrep.com/patent/US20240204567A1

## CPC

- H02J 1/14: Balancing load and power generation in DC networks
- H02J 50/10: using inductive coupling
- G01H 11/08: using piezoelectric devices
- G01R 31/343: {in operation}
- H02J 1/106: {for load balancing, symmetrisation, or sharing}
- H02J 7/855: {with circuits adapted for supplying loads from the battery}
- H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)}
- H02J 50/001: {Energy harvesting or scavenging}
- H02J 50/005: {Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices}
- H02K 11/25: Devices for sensing temperature, or actuated thereby
- H02J 2207/10: Control circuit supply, e.g. means for supplying power to the control circuit
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- G01H: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

An electric apparatus of an electric machine including a transformer, a primary coil of the transformer receiving electric energy from a harvesting electric circuit located within an electric machine and a secondary coil of the transformer receiving electric energy of the harvested electric energy from the primary coil inductively. The secondary coil outputs the received electric energy for a battery charger of a monitoring system of the electric machine.

## Claims

### Claim 1

A electric apparatus of an electric machine, the electric apparatus comprising a transformer, a primary coil of the transformer being configured to receive electric energy from a harvesting electric circuit located within an electric machine and a secondary coil of the transformer being configured to receive electric energy of the harvested electric energy from the primary coil inductively and output the received electric energy for a battery charger of a monitoring system of the electric machine.

### Claim 2 (depends on 1)

The apparatus of claim 1, further comprising a chargeable battery, the battery charger being configured to charge a battery of the monitoring system with the harvested electric energy for the operation of the monitoring system at least partly.

### Claim 3 (depends on 1)

The apparatus of claim 1, further comprising at least one sensor that is configured to receive the harvested electric power for measuring an operational property of the electric machine.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein at least one sensor is configured to measure vibration of the electric machine.

### Claim 5 (depends on 1)

The apparatus of claim 1, further comprising a communication unit that is configured to receive electric energy harvested by the harvesting circuit, and communicate outside the apparatus.

### Claim 6 (depends on 1)

The apparatus of claim 1, further comprising a switch arrangement, which is configured to switch between two alternative states: a first state and a second state;
the first state being configured to enable a measurement of voltage over of the harvesting circuit; and
the second state being configured to feed electric energy from the harvesting circuit to the charger.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein the controller is configured to determine a load, an electric input current or an electric output current of the electric machine based on measurements of the first state.

### Claim 8 (depends on 6)

The apparatus of claim 6, further comprising a switch arrangement, which is configured to switch between three alternative states: a first state, a second state and a third state;
the first state being configured to enable a measurement of voltage of the harvesting circuit without load, a third state being configured to connect a known load known resistor in series with the harvesting circuit for enabling a measurement of voltage over the known load resistor; and
the switch arrangement being configured to block electric energy feed from the harvesting circuit to any other electric circuit in the first and third state except for the measurements.

### Claim 9 (depends on 6)

The apparatus of claim 6, wherein the controller is configured to determine a temperature of the stator of the electric machine based on measurements in the first state and the third state.

### Claim 10 (depends on 6)

The apparatus of claim 6, wherein the controller is configured to control the switching arrangement.

### Claim 11 (depends on 6)

The apparatus of claim 6, wherein the controller is configured to control the switching arrangement as function of charging level of the battery.

### Claim 12 (depends on 1)

The apparatus of claim 1, further comprising one or more processors; and
one or more memories including computer program code;
the one or more memories and the computer program code configured to, with the one or more processors, cause apparatus at least to:
determine an operational property of the electric machine.

### Claim 13

An electric method for an electric machine, comprising the steps of: receiving, by a primary coil of a transformer, electric energy from a harvesting electric circuit located within an electric machine;
receiving, by a secondary coil of the transformer, electric energy of the harvested electric energy from the primary coil inductively; and
outputting the received electric energy for a battery charger of a monitoring system of the electric machine.

### Claim 14 (depends on 13)

The method of claim 13, further comprising charging, by the battery charger, a chargeable battery of the monitoring system, with the harvested electric energy for the operation of the monitoring system at least partly.

### Claim 15 (depends on 13)

The method of claim 13, further comprising switching, by a switch arrangement, between three alternative states: a first state, a second state and a third state;
the first state enables a measurement of voltage over of the harvesting circuit without load, a third state connecting a known load resistor in series with the harvesting circuit and measuring voltage over the known load resistor; and
blocking, by the switch arrangement, electric energy feed from the harvesting circuit to any other electric circuit in the first and third state except for the measurements.

### Claim 16 (depends on 2)

The apparatus of claim 2, further comprising a communication unit that is configured to receive electric energy harvested by the harvesting circuit and communicate outside the apparatus.

### Claim 17 (depends on 7)

The apparatus of claim 7, wherein the controller is configured to control the switching arrangement as function of charging level of the battery.