Switching of particular inputs in a signal processing channel permits an independent evaluation of that signal processing channel, in a system where there are at least two signal processing channels, one of which is able to be calibrated while the other of which is measuring current in a shunt. Switching a controlled current through a shunt, the controlled current being small in value compared with an overall current being measured, permits yet another independent evaluation of the shunt.

Presented is an electronic meter for supplying driving power to a battery module charged by wireless power transmission. The presented electronic meter includes a usage detection module for detecting energy usage of a consumer, a control module for generating meter data based on the energy usage detected by the usage detection module, a communication module for transmitting the meter data generated by the control module to a meter reading server or a repeater, a battery module composed of a secondary cell, and for supplying driving power to the usage detection module, the control module, and the communication module, and a wireless power receiving module for receiving power wirelessly from a wireless power transmission device to charge the battery module.

Disclosed are a high-precision resistance measurement system and method combining a micro-differential method and a ratiometric method. The system includes a constant-current source, a reference resistor, a first differential amplifier, a programmable gain amplifier (PGA), an ADC, a microprocessor, a DAC and a to-be-measured resistor interface. The reference resistor and a to-be-measured resistor are connected in series between the constant-current source and ground. The voltage across the reference resistor is inputted to the first differential amplifier, and the output of the first differential amplifier is used as the reference voltage for the ADC and the DAC. The single-ended voltage to ground of the to-be-measured resistor and the output voltage of the DAC are inputted to the PGA in differential manner, and the PGA outputs the amplified difference voltage to the ADC. The output terminal of the ADC and the input terminal of the DAC are both connected to the microprocessor.

An impedance measurement device of the present disclosure includes: an electrochemical energy device; an amplifier connected to each connection terminal of the electrochemical energy device and configured to amplify a signal introduced into a wiring; and a main board configured to receive the signal from the amplifier and measure an impedance. Accordingly, the present invention has advantages in that high resistance to electromagnetic interference may be achieved by disposing a preamplifier close to a terminal of an electrochemical energy device to amplify only the signal without amplifying a noise introduced into a wiring.

A measurement input circuit for a measurement device for measuring an electric signal in a device under test comprises a signal input that receives the electronic signal from the device under test and provides the received electronic signal at a signal node, a direct signal coupling path that is coupled between the signal node an electrical ground and comprises a first impedance value, an alternating signal coupling path that is coupled between the signal node and the electrical ground , and comprises a second impedance value that is lower than the first impedance value, and a signal output that is coupled to the signal node and outputs the received electronic signal.

A measurement input circuit for a measurement device for measuring an electric signal in a device under test comprises a signal input that receives the electronic signal from the device under test and provides the received electronic signal at a signal node, a direct signal coupling path that is coupled between the signal node an electrical ground and comprises a first impedance value, an alternating signal coupling path that is coupled between the signal node and the electrical ground , and comprises a second impedance value that is lower than the first impedance value, and a signal output that is coupled to the signal node and outputs the received electronic signal.

A method for producing a pulse inverter comprising a module with electronic components, a contact bar sticking out from the side of the module for contacting the pulse inverter with a contact external to the pulse inverter, a current measuring device arranged on the contact bar for detecting a measurement signal regarding the current strength in the contact bar and a control board arranged on the top or bottom of the module with a driver circuit for control of the electronic components with the aid of the measurement signal, wherein the driver circuit makes contact with the module across control contacting pins of the module and with the current measuring device across measurement contacting pins of the current measuring device, wherein the current measuring device is attached to the contact bar such that it is movably mounted with respect to it, after which the control board is positioned such that the control contacting pins are led through control contact openings of the control board and the current measuring device is oriented by displacing it such that the measurement contacting pins are led through measurement contact openings of the control board, after which the current measuring device is secured to the contact bar and/or the control board.

A method for producing a pulse inverter comprising a module with electronic components, a contact bar sticking out from the side of the module for contacting the pulse inverter with a contact external to the pulse inverter, a current measuring device arranged on the contact bar for detecting a measurement signal regarding the current strength in the contact bar and a control board arranged on the top or bottom of the module with a driver circuit for control of the electronic components with the aid of the measurement signal, wherein the driver circuit makes contact with the module across control contacting pins of the module and with the current measuring device across measurement contacting pins of the current measuring device, wherein the current measuring device is attached to the contact bar such that it is movably mounted with respect to it, after which the control board is positioned such that the control contacting pins are led through control contact openings of the control board and the current measuring device is oriented by displacing it such that the measurement contacting pins are led through measurement contact openings of the control board, after which the current measuring device is secured to the contact bar and/or the control board.

An energization evaluation test equipment for an input filter of a large capacity PWM converter by reducing the power supply capacity to the equipment under test is provided. The energization evaluation test is equivalent to an actual load test. An equipment under test has an input filter connected to an output terminal of an AC power source and a PWM converter connected to an output terminal of the input filter to convert an AC power source to a DC power source. The evaluation test equipment includes a PWM converter input filter and a PWM converter configured similarly to the PWM converter input filter and the PWM converter of the equipment under test, respectively, a direct current reactor connected to an output terminal of a PWM converter of the equipment under test, a PWM controller for controlling the PWM converter of the equipment under test and controlling the PWM converter of the energization evaluation test equipment, wherein, outputs of the PWM converter of the equipment under test and the PWM converter of the energization evaluation test equipment are connected in series via the direct current reactor, and the PWM controller is performed so that the output voltage of the PWM converter of the equipment under test becomes a desired value and the output current of the PWM converter of the energization evaluation test equipment becomes a desired value.

An energization evaluation test equipment for an input filter of a large capacity PWM converter by reducing the power supply capacity to the equipment under test is provided. The energization evaluation test is equivalent to an actual load test. An equipment under test has an input filter connected to an output terminal of an AC power source and a PWM converter connected to an output terminal of the input filter to convert an AC power source to a DC power source. The evaluation test equipment includes a PWM converter input filter and a PWM converter configured similarly to the PWM converter input filter and the PWM converter of the equipment under test, respectively, a direct current reactor connected to an output terminal of a PWM converter of the equipment under test, a PWM controller for controlling the PWM converter of the equipment under test and controlling the PWM converter of the energization evaluation test equipment, wherein, outputs of the PWM converter of the equipment under test and the PWM converter of the energization evaluation test equipment are connected in series via the direct current reactor, and the PWM controller is performed so that the output voltage of the PWM converter of the equipment under test becomes a desired value and the output current of the PWM converter of the energization evaluation test equipment becomes a desired value.