Abstract: A storage device having a multi drop structure is provided. The storage device comprises a storage controller configured to output a data signal, a first non-volatile memory configured to receive the data signal, a first wiring electrically connected to the storage controller and configured to transfer the data signal, a first termination module including a first impedance element that electrically connects the first wiring to at least one of a power voltage or a ground voltage, a second wiring electrically connected to the first wiring and configured to transfer the data signal to the first non-volatile memory, and a third wiring electrically connected to the first wiring and configured to transfer the data signal to the first termination module.

Abstract: A rotation angle estimation module is provided. The rotation angle estimation module includes: a fixed flux instruction estimation unit calculating a rotating flux (?sd, ?sq) and a fixed flux instruction (?s?*, ?s?*) based on a rotation angle ? and the current (Is?, Is?) of a fixed coordinate system; a fixed flux estimation unit calculating a fixed flux (?s?, ?s?) based on the voltage (Vs?, Vs?) of the fixed coordinate system, and the current (Is?, Is?) and fixed flux error (?s?, ?s?) of the fixed coordinate system; a fixed flux error estimation unit using the fixed flux instruction (?s?*, ?s?*) and the fixed flux (?s?, ?s?) to calculate the fixed flux error (?s?, ?s?) and feed the errors back to the fixed flux estimation unit; and a trigonometric function calculation unit calculating the rotation angle ? based on the rotating flux (?sd, ?sq) and the fixed flux (?s?, ?s?).

Abstract: An apparatus and method for controlling an operation of an inverter are provided. In the inverter control apparatus, an operation signal input unit detects a current of each phase output from an inverter. An error detecting unit detects whether there is a fault of the inverter on the basis of the current detected by the operation signal input unit. A controller controls driving of the inverter according to a type of the fault detected by the error detecting unit. A storage unit stores a kind of fault of the inverter and a corresponding fault type on the basis of the current detected in the operation signal detecting unit.

Abstract: Some embodiments may include an apparatus for driving a single power supply of a high power insulated gate bipolar transistor (IGBT). The apparatus may include a gate driver IC to supply a signal for driving the IGBT; an external capacitor connected between a gate and an emitter of the IGBT; a signal inverter to invert an output signal of the gate driver IC; and a switch to supply power to the external capacitor in response to an output signal of the signal inverter.

Abstract: A rotation angle estimation module is provided. The rotation angle estimation module includes: a fixed flux instruction estimation unit calculating a rotating flux (?sd, ?sq) and a fixed flux instruction (?s?*, ?s?*) based on a rotation angle ? and the current (Is?, Is?) of a fixed coordinate system; a fixed flux estimation unit calculating a fixed flux (?s?, ?s?) based on the voltage (Vs?, Vs?) of the fixed coordinate system, and the current (Is?, Is?) and fixed flux error (?s?, ?s?) of the fixed coordinate system; a fixed flux error estimation unit using the fixed flux instruction (?s?*, ?s?*) and the fixed flux (?s?, ?s?) to calculate the fixed flux error (?s?, ?s?) and feed the errors back to the fixed flux estimation unit; and a trigonometric function calculation unit calculating the rotation angle ? based on the rotating flux (?sd, ?sq) and the fixed flux (?s?, ?s?).

Abstract: Disclosed is a method of detecting the disconnection state of a power cable in an inverter system. The method includes detecting a battery voltage, detecting a DC-link voltage, detecting the disconnection state of the power cable based on a difference value between the detected battery voltage and the DC-link voltage, and stopping driving of a motor if the power cable is detected as being disconnected.

Abstract: An apparatus and method for controlling an operation of an inverter are provided. In the inverter control apparatus, an operation signal input unit detects a current of each phase output from an inverter. An error detecting unit detects whether there is a fault of the inverter on the basis of the current detected by the operation signal input unit. A controller controls driving of the inverter according to a type of the fault detected by the error detecting unit. A storage unit stores a kind of fault of the inverter and a corresponding fault type on the basis of the current detected in the operation signal detecting unit.

Abstract: Disclosed is a method of detecting the disconnection state of a power cable in an inverter system. The method includes detecting a battery voltage, detecting a DC-link voltage, detecting the disconnection state of the power cable based on a difference value between the detected battery voltage and the DC-link voltage, and stopping driving of a motor if the power cable is detected as being disconnected.

Abstract: The present disclosure provides a capacitor abnormality detection method and detection apparatus for accurately detecting an abnormality of an individual capacitor in a circuit in which two or more capacitors are connected in series at a low cost, and the capacitor abnormality detection apparatus includes: a measuring unit configured to measure capacitance of the circuit from both ends of the circuit; a storage unit configured to store the measured capacitance of the circuit and hours of use of the circuit during the measurement; and a determining unit configured to determine whether an abnormality is generated in at least one capacitor configuring the circuit by comparing the measured capacitance of the circuit and predetermined expected capacitance.

Abstract: A system for detecting a mis-connected state between communication lines for a multi-type air conditioner and a method thereof. The system comprises an indoor unit pipe temperature detection unit for detecting a temperature of an indoor unit pipe, and a microprocessor for controlling an opening of an electronic expansion valve based on a temperature detected by the indoor unit pipe temperature detection unit, comparing a temperature response characteristic of the indoor unit pipe with a preset temperature response characteristic of a normal indoor unit pipe based on an opening of the electronic expansion valve, and thereby judging whether the communication lines are mis-connected to one another or not. An indoor unit from which the mis-connection has been generated is fast detected, and error information is displayed. Accordingly, the mis-connected state between the communication lines is restored, thereby preventing a damage of the system due to the mis-connection.

Abstract: An apparatus and method for monitoring state information in a trial run mode of a multi-airconditioning system in which a plurality of indoor units are controlled by only one outdoor unit is disclosed. The apparatus and method connects a dedicated controller to the outdoor unit in a trial run mode of the multi-airconditioning system, such that it controls the indoor units and monitors state information of the indoor and outdoor units. The apparatus includes a trial-run-mode controller and a control input & state display unit. The trial-run-mode controller connected to the outdoor unit includes a trial-run-mode program for automatically detecting poor installation of the multi-airconditioning system.

Abstract: A system for detecting a mis-connected state between communication lines for a multi-type air conditioner and a method thereof. The system comprises an indoor unit pipe temperature detection unit for detecting a temperature of an indoor unit pipe, and a microprocessor for controlling an opening of an electronic expansion valve based on a temperature detected by the indoor unit pipe temperature detection unit, comparing a temperature response characteristic of the indoor unit pipe with a preset temperature response characteristic of a normal indoor unit pipe based on an opening of the electronic expansion valve, and thereby judging whether the communication lines are mis-connected to one another or not. An indoor unit from which the mis-connection has been generated is fast detected, and error information is displayed. Accordingly, the mis-connected state between the communication lines is restored, thereby preventing a damage of the system due to the mis-connection.