摘要:
In a motor control apparatus of the present invention, a control section which receives an input voltage to an inverter circuit, a motor current flowing to a brushless motor and a motor current command value indicating the value of a current required to flow to the inverter circuit, and controls the inverter circuit by maintaining a phase of the voltage applied to the brushless motor when the value of the input voltage to the inverter circuit is smaller than the value of a voltage required to be applied to the brushless motor.
摘要:
An inverter control device for driving a motor with small size, light weight and low cost is provided. The inverter control device includes a first motor voltage command corrector that corrects a voltage command of each phase by multiplying the each phase voltage command by a PN voltage correction coefficient, and a second motor voltage command corrector that corrects again the each phase voltage command once corrected by the first motor voltage command corrector, only when any one of the phase voltage commands corrected by the first motor voltage command corrector is larger than the inverter DC voltage, by multiplying the voltage command of each phase corrected by the first motor voltage command corrector by the inverter DC voltage value, and dividing the product of the multiplication by the maximum value of the phase voltage commands corrected by the first motor voltage command corrector.
摘要:
An inverter control device for driving a motor with small size, light weight and low cost is provided. The inverter control device generates PN voltage correction coefficient by dividing the reference DC voltage by the detected DC voltage, and corrects the voltage command of each phase by multiplying the voltage command of each phase obtained by the motor voltage command generator with the PN voltage correction coefficient output from the PN voltage corrector, thus resulting in the corrected motor voltage command. The inverter control device has, in generating PN voltage correction coefficient, a first mode in which the PN voltage correction coefficient is set to 1 when the DC voltage value is more than the reference DC voltage, and a second mode in which the value obtained by dividing the reference DC voltage by the detected DC voltage is set to the PN voltage correction coefficient.
摘要:
A reactor having a predetermined small capacity is connected to a rectifier, and a capacitor having a predetermined small capacity is connected between DC bus lines of the inverter. A PN voltage corrector calculates a ratio of the DC voltage detection value of the inverter obtained by the PN voltage detector to a predetermined DC voltage reference value of the inverter to thereby generate a PN voltage correction factor. A beat amount corrector calculates a fluctuation amount of the motor current from the motor current detection value obtained by the motor current detector and generates a reverse phase component of the motor current fluctuation amount. Thus, a small, light and low-cost inverter controller can be implemented.
摘要:
A reactor having a predetermined small capacity is connected to a rectifier, and a capacitor having a predetermined small capacity is connected between DC bus lines of the inverter, so that a small, light and low-cost inverter controller for driving a motor can be implemented, and even when an inverter DC voltage largely fluctuates and it is difficult to drive the motor, the motor can be kept driving by operating the inverter such that a voltage applied to the motor may stay constant by a motor voltage command corrector which generates a motor voltage command correction value of the motor.
摘要:
An inverter controller for driving a motor includes a rectifier having a reactor, an inverter, a capacitor, a generator which generates a voltage command value for each phase of the motor, a detector which detects a DC voltage between the DC buses of the inverter, a first corrector which calculates a voltage correction coefficient by comparing the DC voltage with a predetermined DC reference voltage, a second corrector which corrects the voltage command value by multiplying the voltage command value and the voltage correction coefficient, a selector which selects either two-phase modulation or three-phase modulation as a modulation type, a computer that computes a carrier frequency, and a pulse width modulation controller which controls a pulse width modulation so that a value of a voltage to be applied to the motor equals to the corrected voltage command value, by using the selected modulation type and the selected carrier frequency.
摘要:
There is provided a medicine packaging method, which is capable of rapidly coping with errors occurring during processes. The medicine packaging method includes the following steps: a medicine supplying step for supplying a relevant medicine according to a prescription data; a medicine standby step for allowing the supplied medicine to temporarily stand by; a medicine detecting step for detecting the standing by medicine; a printing step for printing a packaging paper when the medicine based on the prescription data is detected; a conveying step for conveying the packaging paper; and a packaging step for supplying the temporarily standing by medicine to a printed portion of the packaging paper and packaging the medicine. The steps are performed in sequence.
摘要:
A measuring method includes measuring a sum of an optical path length of a test object and a first medium in a first container, introducing light into an area that includes the first medium but does not include the test object and measuring the optical path length of the first medium, measuring a sum of the optical path length of the test object and a second medium in a second container, the second medium having a refractive index different from that of the first medium, introducing the light into an area that includes the second medium but does not include the test object and of measuring the optical path length of the second medium, and calculating a refractive index of the test object based on the measured optical path lengths and an actual distance of an optical path for which each optical path length is measured.
摘要:
There is provided a medicine dispensing system configured such that a medicine dispensing device includes a sub unit having a function to dispense medicine that is connected to a medicine dispensing device that includes a main unit having a function of packing medicines. There is also provided a medicine dispensing device that can be appropriately integrated with such a medicine dispensing system. The medicine dispensing system includes, in some embodiments a main unit, a sub unit and a transfer device connecting the main unit and the sub unit. The medicine dispensing system transfers the medicine dispensed in the sub unit to the main unit by means of a transfer device and dispenses the medicine at a medicine packing part together with the medicine dispensed from a main storage part in the main unit.
摘要:
There is provided a medicine packaging apparatus, which is capable of rapidly coping with errors occurring during processes. The medicine packaging apparatus includes: a medicine supply means 1 for supplying a medicine according to prescription data; a medicine standby means 11 for temporarily holding the medicine supplied by the medicine supply means 1 and having the medicine stand by; a printing means 2 for printing relevant data on a packaging paper according to the prescription data; a packaging paper conveyance means for conveying a packaging paper 15; a medicine packaging means 3 for packaging the medicine supplied by the medicine supply means 1 into the packaging paper 15 in a packaging position; and a control means 4 for allowing the packaging paper conveyance means to convey a relevant portion of the packaging paper 15, on which the relevant data is printed by the printing means 2, to the packaging position and allowing the medicine packaging means to package the corresponding medicine standing by in the medicine standby means 11.