Abstract: A failure diagnosis method for an inverter circuit includes a first monitoring step of monitoring an inter-terminal voltage between a high-potential-side terminal and a low-potential-side terminal of each of a plurality of driving devices included in the inverter circuit, and a second monitoring step of monitoring a power supply voltage of the inverter circuit. A determination step of determining whether there is a failure in each of the driving devices from a value of the inter-terminal voltage and a value of the power supply voltage is included.

Abstract: A motor control system includes plural control circuits and plural motor circuits. Each motor circuit includes an inverter circuit and a coil. The plural motor circuits are controlled by any one of the control circuits or controlled by the plural control circuits in combination. When any one of the control circuits controlling the motor circuits fails, the motor control system performs switching control so that the failing control circuit is disconnected while another normally-operating control circuit controls the corresponding motor circuit. The failure detection and switching control are performed smoothly and quickly to recover the motor control system from the failure, thus enhancing the reliability.

Abstract: A circuit board includes a power supply terminal connection assembly supplied with current from an external power supply, a first motor circuit that generates current to be supplied to a first winding, a first motor terminal connection assembly that supplies the current to the first winding from the first motor circuit, a second motor circuit that generates current to be supplied to a second winding, a second motor terminal connection assembly that supplies the current to the second winding from the second motor circuit, a first region, and a second region, in which the power supply terminal connection assembly is in the first region or the second region on a side of one end portion of a border line between the first and the second region, and the first and second motor terminal connection assemblies are on a side of another end portion of the border line.

Abstract: A failure diagnosis method for an inverter circuit, which easily performs failure diagnosis of a FET of the inverter circuit without delay includes comparing a motor terminal voltage corresponding to each phase of the inverter circuit including semiconductor switching devices (FETs) to drive a motor, with a threshold voltage by comparators as voltage comparison circuitry. At this time, the threshold voltage is changed according to a high-side FET and a low-side FET on which failure diagnosis is to be performed. Subsequently, by a digital output from the comparator, whether there is a short circuit of each FET of the motor terminal voltage is determined.

Abstract: A failure diagnosis method for an inverter circuit includes a first monitoring step of monitoring an inter-terminal voltage between a high-potential-side terminal and a low-potential-side terminal of each of a plurality of driving devices included in the inverter circuit, and a second monitoring step of monitoring a power supply voltage of the inverter circuit. A determination step of determining whether there is a failure in each of the driving devices from a value of the inter-terminal voltage and a value of the power supply voltage is included.

Abstract: A motor control system includes plural control circuits and plural motor circuits. Each motor circuit includes an inverter circuit and a coil. The plural motor circuits are controlled by any one of the control circuits or controlled by the plural control circuits in combination. When any one of the control circuits controlling the motor circuits fail, the motor control system performs switching control so that the failing control circuit is disconnected while another normally-operating control circuit controls the corresponding motor circuit. The failure detection and switching control are performed smoothly and quickly to recover the motor control system from the failure, thus enhancing the reliability.

Abstract: A circuit board includes a power supply terminal connection assembly supplied with current from an external power supply, a first motor circuit that generates current to be supplied to a first winding, a first motor terminal connection assembly that supplies the current to the first winding from the first motor circuit, a second motor circuit that generates current to be supplied to a second winding, a second motor terminal connection assembly that supplies the current to the second winding from the second motor circuit, a first region, and a second region, in which the power supply terminal connection assembly is in the first region or the second region on a side of one end portion of a border line between the first and the second region, and the first and second motor terminal connection assemblies are on a side of another end portion of the border line.

Abstract: A motor drive device includes a plurality of control systems that individually supply drive currents to a plurality of coil groups included in a motor. The motor drive device independently sets the current command values for the respective control systems. Based on the set current command values, drive instructions are supplied to drive circuits of inverters with respect to the respective control systems, thereby supplying drive currents from the inverters to the coil groups. The motor drive device detects a failure in any of the inverters and the coil groups with respect to each control system, and stops only the failed control system or causes only the failed control system to fall back. The motor drive device further includes a main computing device, and an auxiliary computing device. Consequently, if the auxiliary computing device is normal even in case the main computing device fails, driving of the motor can be continued using one or some of the control systems.

Abstract: In this motor drive device, a motor case which stores a motor and a controller case which stores a controller of controlling the motor are unitarily coupled to each other in a direction of the rotating shaft of the motor. In addition, a connection portion for an external connector included in the controller is also provided in the direction of the rotating shaft of the motor. Such a structure achieves a small and compact structure which can be connected in the direction of the rotating shaft.

Abstract: A motor drive device includes a plurality of control systems that individually supply drive currents to a plurality of coil groups included in a motor. The motor drive device independently sets the current command values for the respective control systems. Based on the set current command values, drive instructions are supplied to drive circuits of inverters with respect to the respective control systems, thereby supplying drive currents from the inverters to the coil groups. The motor drive device detects a failure in any of the inverters and the coil groups with respect to each control system, and stops only the failed control system or causes only the failed control system to fall back. The motor drive device further includes a main computing device, and an auxiliary computing device. Consequently, if the auxiliary computing device is normal even in case the main computing device fails, driving of the motor can be continued using one or some of the control systems.

Abstract: A first device according to one embodiment includes, but is not limited to, receiver circuitry, determinator circuitry, and transmitter circuitry. The receiver circuitry is configured and/or programmed to receive from a second device, first information for controlling a third device. The determinator circuitry is configured and/or programmed to determine whether or not the first information is to be transmitted to the third device, based on the first information received and second information stored in the first device. The second information regards at least a first parameter of the third device that the second device is authorized to control. The transmitter circuitry is configured and/or programmed to, in a case that the first information is determined to be transmitted to the third device, transmit the first information to the third device.

Abstract: An electronic control apparatus configured to control electric power steering and provided integrally with an electric motor is electrically connected to an ignition switch and which assists a rotation operation of a steering column by rotation of the electric motor. A first magnetism detecting element configured to operate using power supplied via the ignition switch to output a first set of rotation angle signals of the electric motor. A second magnetism detecting element configured to operate continuously using continuously supplied power to output a second set of rotation angle signals of the electric motor. A controller configured or programmed to generate rotation angle information about the electric motor based on the first set of rotation angle signals and the second set of rotation angle signals outputted while the ignition switch is stopped and to calculate a position of a steering wheel from the generated rotation angle information.

Abstract: An electronic control apparatus configured to control electric power steering and provided integrally with an electric motor is electrically connected to an ignition switch and which assists a rotation operation of a steering column by rotation of the electric motor. A first magnetism detecting element configured to operate using power supplied via the ignition switch to output a first set of rotation angle signals of the electric motor. A second magnetism detecting element configured to operate continuously using continuously supplied power to output a second set of rotation angle signals of the electric motor. A controller configured or programmed to generate rotation angle information about the electric motor based on the first set of rotation angle signals and the second set of rotation angle signals outputted while the ignition switch is stopped and to calculate a position of a steering wheel from the generated rotation angle information.

Abstract: In this motor drive device, a motor case which stores a motor and a controller case which stores a controller of controlling the motor are unitarily coupled to each other in a direction of the rotating shaft of the motor. In addition, a connection portion for an external connector included in the controller is also provided in the direction of the rotating shaft of the motor. Such a structure achieves a small and compact structure which can be connected in the direction of the rotating shaft.

Abstract: A WAP (Wireless Application Protocol) analyzer located on a transmission line between communication apparatuses using WAP. A WAP packet includes at least one WTP-PDU (Wireless Transaction Protocol—Protocol Data Unit). The WAP analyzer comprising, database (16) for storing state-transition specification data that define a state-transition with a cause-and-effect relationship between WTP-PDUs, states of a WTP layer, primitives between the WTP layer and WSP (Wireless Session Protocol) layer, and states of the WSP layer, based on WAP specification, means (11) for extracting the WTP-PDUs from the WAP packets, and means (13) for estimating the state-transition of the WTP layer and the WSP layer, to the apparatus that received one of the WTP-PDUs and subsequently sent other of the WTP-PDUs, for each pair of a sender and a receiver.

Abstract: A WAP (Wireless Application Protocol) analyzer located on a transmission line between communication apparatuses using WAP. A WAP packet includes at least one WTP-PDU (Wireless Transaction Protocol—Protocol Data Unit). The WAP analyzer comprising, database (16) for storing state-transition specification data that define a state-transition with a cause-and-effect relationship between WTP-PDUs, states of a WTP layer, primitives between the WTP layer and WSP (Wireless Session Protocol) layer, and states of the WSP layer, based on WAP specification, means (11) for extracting the WTP-PDUs from the WAP packets, and means (13) for estimating the state-transition of the WTP layer and the WSP layer, to the apparatus that received one of the WTP-PDUs and subsequently sent other of the WTP-PDUs, for each pair of a sender and a receiver.

Abstract: A method of transferring data in mobile IP of the present invention comprises the steps of: causing the home agent(HA) to store as a care-of-address of the mobile host (MH) an address of the foreign agent (FA) received from MH; causing a DNS server in the home network (HN) to demand the care-of-address of MH from HA in response to the request of the communication terminal about the IP address and the care-of-address of MH; causing HA to provide the DNS server with the care-of-address of MH upon receiving the demand; and causing the DNS server to deliver the IP address and the care-of-address of MH to the communication terminal.

Abstract: An IP tunnel is constructed between routers connected with the INTERNET. A bandwidth of the IP tunnel is assured by setting up a reservation resource protocol (RSVP) on the IP tunnel. Further as a traffic control of the routers and on the IP tunnel, a frequency for sending packets, which are processed by an input processor and an output processor inside of the router, is allotted based on a ratio of the reserved bandwidth in each IP tunnel, then an algorithm for controlling the traffic is simplified. Furthermore each of the routers on the IP tunnel has a function for scheduling a reservation and manages a time period at which the virtual private network (VPN) of a type of the reservation resource protocol (RSVP) will be used, then it is possible to reserve the assurance of the bandwidth on the designated date and time in the future.