# US 9,733,635 B2 · Electric machine and display method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,733,635 B2 - Document ID: US9733635B2 - Status: Granted - Kind: B2 - Application number: 14/939,992 - Filed: 2015-11-12 - Published: 2016-05-19 - Granted: 2017-08-15 - Earliest claimed: 2014-11-13 - Assignees: Toshiba Kikai Kabushiki Kaisha - Applicants: Toshiba Kikai Kabushiki Kaisha - Inventors: Takamichi Ito - Web page: https://patentgrep.com/patent/US9733635B2 ## CPC - H02K 11/25: Devices for sensing temperature, or actuated thereby - H02P 6/08: Arrangements for controlling the speed or torque of a single motor (H02P6/10, H02P6/28 take precedence) - H02P 21/18: Estimation of position or speed - H02P 21/20: Estimation of torque - G05B 2219/42289: Avoid overload servo motor, actuator limit servo torque - G05B 2219/42304: Load, torque threshold as function of speed - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) ## Abstract An electric machine according to the embodiment includes: a motor; a current controller supplying a current to the motor; a detector detecting a position, a speed, or an acceleration of a shaft of the motor; a controller calculating a torque parameter indicating a torque of the motor based on a current instruction that specifies a supply current to the motor and calculating a speed parameter indicating a rotational speed of the shaft of the motor based on a detection result from the detector; and a display part displaying a graph showing a relation between the torque parameter and the speed parameter. ## Claims ### Claim 1 An electric machine comprising: a motor; a current controller configured to supply a current to the motor; a detector configured to detect a position, a speed, or an acceleration of a shaft of the motor; a controller configured to calculate a torque parameter indicating a torque of the motor based on a current instruction that specifies a supply current to the motor and calculating a speed parameter indicating a rotational speed of the shaft of the motor based on a detection result from the detector; and a display part configured to display a graph showing a relation between the torque parameter and the speed parameter, wherein one of a horizontal axis and a vertical axis of the graph represents the torque parameter and the other of the horizontal axis and the vertical axis represents the speed parameter. ### Claim 2 (depends on 1) The machine of claim 1, wherein the torque parameter is any one of a current value supplied to the motor, a rotation torque of the shaft of the motor, and an acceleration or pressure of a control target to be operated by the motor, or is calculated from any one thereof, and the speed parameter is the rotational speed of the shaft of the motor, or is calculated from either a position or an acceleration of the shaft of the motor. ### Claim 3 (depends on 1) The machine of claim 1, wherein the torque parameter has an upper limit, and the controller is configured to control the current controller and the motor to prevent the torque parameter from exceeding the upper limit. ### Claim 4 (depends on 2) The machine of claim 2, wherein the torque parameter has an upper limit, and the controller is configured to control the current controller and the motor to prevent the torque parameter from exceeding the upper limit. ### Claim 5 (depends on 1) The machine of claim 1, wherein the controller is configured to issue a warning when the torque parameter exceeds an upper limit. ### Claim 6 (depends on 2) The machine of claim 2, wherein the controller is configured to issue a warning when the torque parameter exceeds an upper limit. ### Claim 7 (depends on 3) The machine of claim 3, wherein the controller is configured to issue a warning when the torque parameter exceeds an upper limit. ### Claim 8 (depends on 1) The machine of claim 1, wherein the display part is configured to display the torque parameter and the speed parameter almost in real-time with driving of the motor. ### Claim 9 (depends on 2) The machine of claim 2, wherein the display part is configured to display the torque parameter and the speed parameter almost in real-time with driving of the motor. ### Claim 10 (depends on 3) The machine of claim 3, wherein the display part is configured to display the torque parameter and the speed parameter almost in real-time with driving of the motor. ### Claim 11 (depends on 1) The machine of claim 1, wherein the display part is configured to show change rates of the torque parameter and the speed parameter using widths or thicknesses of a line of the graph. ### Claim 12 (depends on 2) The machine of claim 2, wherein the display part is configured to show change rates of the torque parameter and the speed parameter using widths or thicknesses of a line of the graph. ### Claim 13 (depends on 3) The machine of claim 3, wherein the display part is configured to show change rates of the torque parameter and the speed parameter using widths or thicknesses of a line of the graph. ### Claim 14 (depends on 1) The machine of claim 1, wherein the display part is configured to show any one of a temperature change of the motor, a rotation direction of the shaft of the motor, and a position or work process of a control target to be operated by the motor using colors of a line of the graph. ### Claim 15 (depends on 2) The machine of claim 2, wherein the display part is configured to show any one of a temperature change of the motor, a rotation direction of the shaft of the motor, and a position or work process of a control target to be operated by the motor using colors of a line of the graph. ### Claim 16 (depends on 3) The machine of claim 3, wherein the display part is configured to show any one of a temperature change of the motor, a rotation direction of the shaft of the motor, and a position or work process of a control target to be operated by the motor using colors of a line of the graph. ### Claim 17 A display method performed in an electric machine comprising a motor, a current controller supplying a current to the motor, a detector detecting a position, a speed, or an acceleration of a shaft of the motor, a controller transmitting a current instruction that specifies a supply current to the motor to the current controller, and a display part, the method comprising: causing the controller to calculate a torque parameter indicating a torque of the motor based on the current instruction that specifies a supply current to the motor; causing the controller to calculate a speed parameter indicating a rotational speed of the shaft of the motor based on a detection result from the detector; and causing the display part to display a graph showing a relation between the torque parameter and the speed parameter, wherein one of a horizontal axis and a vertical axis of the graph represents the torque parameter and the other of the horizontal axis and the vertical axis represents the speed parameter. ### Claim 18 (depends on 17) The method of claim 17, wherein the torque parameter is any one of a current value supplied to the motor, a rotation torque of the shaft of the motor, and an acceleration or pressure of a control target to be operated by the motor, or is calculated from any one thereof, and the speed parameter is the rotational speed of the shaft of the motor, or is calculated from either a position or an acceleration of the shaft of the motor. ### Claim 19 (depends on 17) The method of claim 17, wherein the torque parameter has an upper limit, and the controller is configured to control the current controller and the motor to prevent the torque parameter from exceeding the upper limit.