An electronic circuit for a surgical robotic system includes a central power node, a first voltage bus that electrically couples a first power source to the node, a second voltage bus that electrically couples a second power source to the node, and several robotic arms, each arm is electrically coupled to the node via an output circuit breaker and is arranged to draw power from the node. Each bus is arranged to provide power from a respective power source to the node and each bus has an input circuit breaker that is arranged to limit a first output current flow from the node and into the bus. Each breaker that is arranged to limit a second output current flow from the node and into a respective arm. A breaker is arranged to open in response to a fault occurring within the respective arm, while the other breakers remain closed.

A digital power supply protection circuit includes: a signal preprocessing circuit, configured to receive an overcurrent signal and a first inceptive impulse clock timing, and perform preprocessing on the overcurrent signal according to the first inceptive impulse clock timing so as to obtain a first reference signal a signal generation circuit, configured to receive the first inceptive impulse clock timing, count time duration between a rising edge of the first inceptive impulse clock timing and a rising edge of the first reference signal so as to obtain a first time duration, and upon the first time duration is greater than a second time duration, generate a first disabling signal by delaying the rising edge of the first inceptive impulse clock timing for the second time duration; and a clock timing adjustment circuit, configured to adjust the first inceptive impulse clock timing according to the first disabling signal.

A circuit for driving a fan motor includes: a control input interface circuit configured to generate a first digital value indicating an input duty ratio; a duty calculation unit configured to generate a duty command value linearly increasing with a slope with respect to the first digital value; a digital pulse width modulator configured to generate a control pulse having an output duty ratio corresponding to the duty command value; an output circuit configured to drive a fan motor based on the control pulse; a lock protection circuit configured to switch between an enable state and a disable state and to stop supply of power to the fan motor when lock of the fan motor is detected in the enable state; and a torque-off determination unit configured to switch the lock protection circuit to the disable state in a torque-off state.

A circuit for driving a fan motor includes: a control input interface circuit configured to generate a first digital value indicating an input duty ratio; a duty calculation unit configured to generate a duty command value linearly increasing with a slope with respect to the first digital value; a digital pulse width modulator configured to generate a control pulse having an output duty ratio corresponding to the duty command value; an output circuit configured to drive a fan motor based on the control pulse; a lock protection circuit configured to switch between an enable state and a disable state and to stop supply of power to the fan motor when lock of the fan motor is detected in the enable state; and a torque-off determination unit configured to switch the lock protection circuit to the disable state in a torque-off state.

A method for operating an electrical circuit arrangement comprising at least one first component and one second component, wherein the components are electrically connected across a direct current sub-grid of the electrical circuit arrangement, includes switching the first component at a first operating point with a first cycle time and switching the second component at a second operating point with a second cycle time, wherein the components are connected across a communication link and a phase position is determined and set between the first cycle time and the second cycle time as a function of fault information describing at least one present alternating voltage in the direct current sub-grid.

A fluid connector for coolant includes a chamfered lip and a fir tree circumferentially aligned with at least one O-ring on an outer body of the fluid connector. The fluid connector is configured to receive an end piece. The end piece has a standard SAEJ2044 end form. The fluid connector utilizes a housing to form a ribbing and support a seal. An integrated inverter assembly includes a main cover and an opposing back cover; a coolant channel disposed between a coolant channel cover and a coolant channel separating body; wherein power electronics of the integrated inverter assembly are thermally coupled to the coolant channel; wherein at least one of a coolant inlet or a coolant outlet of the coolant channel comprises a fluid connector; and wherein the fluid connector comprises a chamfered lip on an end of the fluid connector.

A fluid connector for coolant includes a chamfered lip and a fir tree circumferentially aligned with at least one O-ring on an outer body of the fluid connector. The fluid connector is configured to receive an end piece. The end piece has a standard SAEJ2044 end form. The fluid connector utilizes a housing to form a ribbing and support a seal. An integrated inverter assembly includes a main cover and an opposing back cover; a coolant channel disposed between a coolant channel cover and a coolant channel separating body; wherein power electronics of the integrated inverter assembly are thermally coupled to the coolant channel; wherein at least one of a coolant inlet or a coolant outlet of the coolant channel comprises a fluid connector; and wherein the fluid connector comprises a chamfered lip on an end of the fluid connector.

A system for detecting overloads of a motor comprises a motor configured to receive power via a lead line, a first sensing device configured to sense a temperature of a motor, and a second sensing device electrically coupled to the motor and configured to detect a target current of the motor and trigger a contact of the lead line associated with second sensing device when the target current equals or exceeds a trip value.

A system for detecting overloads of a motor comprises a motor configured to receive power via a lead line, a first sensing device configured to sense a temperature of a motor, and a second sensing device electrically coupled to the motor and configured to detect a target current of the motor and trigger a contact of the lead line associated with second sensing device when the target current equals or exceeds a trip value.

An electric motor includes a stator and a rotor. The stator has a plurality of low speed windings and a plurality of separate high speed windings. A first type of thermal overload protector is coupled with at least one of the low speed windings and a second type of thermal overload protector is coupled with at least one of the high speed windings.