Injection molding machine capable of reducing power consumption
AssigneeSumitomo Heavy Industries, Ltd.
InventorHiroyuki Mizuno
Life of this patent
Estimating the term…
Abstract
A motor drive 50 of an induction motor IM includes an inverter section 20, a charger 60, a charging and discharging circuit 70 and a control section 80. The charger 60 is for storing regenerated electric power of the induction motor via the inverter section. The charging and discharging circuit 70 is for making the charger charge electric power and making the charger discharge the electric power. The control section carries out control of the charging and discharging circuit for making the charger charge the electric power when the induction motor generates regenerated electric power and making the charger supply the electric power to the induction motor in accelerating the induction motor or in electricity interruption.
Claims19
An injection molding machine, comprising:
- a drive source comprising at least one motor and a motor drive;
- a charger for storing regenerated electric power of the motor and electric power from a power source;
- a charging and discharging circuit connected to said charger for charging electric power to the charger and for discharging electric power therefrom;
- and
- a controller for controlling the charger to charge electric power and for controlling the charger to supply electric power to the motor,
- said controller including a first voltage detecting unit for detecting a voltage on an inverter section included in said motor drive and comparing a voltage detected by the first voltage detecting unit with a predetermined value, the controller controlling the charging and discharging circuit based upon the comparing result.
A method of providing drive power to an injection molding machine, said method comprising the steps of:
- controlling a charger to charge electric power from a power source and to supply electric power to a motor of the injection molding machine,
- the controlling step comprising a first detecting step for detecting a first voltage value on an inverter section and a first comparing step for comparing the first voltage value detected by the first detecting step with a predetermined value, a controller providing control signals to a charging and discharging circuit based upon the comparing result of the first comparing step.
Dependencies are inferred from the claim text.