摘要:
A battery adapter includes an inverter device capable of converting voltage waveform from DC to AC. A first reachable battery and a second rechargeable battery different in shape can be selectively connected to the inverter device. The first rechargeable battery may, for example, a battery pack for use in an electric power tool, and the second rechargeable battery may, for example, a high-capacity lead-acid battery. With the battery adapter, two types of rechargeable batteries can be used as a power source for driving the AC-driven electric power tool. The battery adapter contains therein a microcomputer with which charge/discharge control is implemented.
摘要:
A power tool system includes: a power tool including an AC motor; a portable battery pack; and a power supply device that converts a DC power supplied from the portable battery pack into an AC power to supply the AC power to the AC motor.
摘要:
A power tool system includes: a power tool including an AC motor; a portable battery pack; and a power supply device that converts a DC power supplied from the portable battery pack into an AC power to supply the AC power to the AC motor.
摘要:
A power supply device includes: an inverter that converts a DC power supplied from a battery pack into an AC power and outputs the AC power; and an adapter shapes a waveform of the AC power outputted from the inverter.
摘要:
A battery charger is configured to use selective one of two or more power supplies including a commercial AC power supply and a DC power supply. An AC cable is fixedly secured to the body of the battery charger and a DC cable is detachably connected to the body of the battery charger. A single transformer is employed that has a first primary winding to which the AC power supply is connected a first switching element, a second primary winding to which the DC power supply is connected via a second switching element, and a secondary winding to which a battery pack to be charged is coupled.
摘要:
A battery pack includes a chargeable battery, a battery voltage detecting section, and a determining section. The battery voltage detecting section is configured to detect a battery voltage output from the rechargeable battery. The determining section is configured to determine a voltage level status of the rechargeable battery based on the battery voltage detected by the battery voltage detecting section. The determining section is free from determining the voltage level status when a rate of change in the battery voltage is equal to or greater than a predetermined criteria. Such a battery pack is used for a power tool.
摘要:
A power tool is connectable to a battery pack including a secondary battery. The power tool includes a motor and a prohibiting unit. The motor is driven with an electrical power supplied from the secondary battery. The prohibiting unit prohibits the supply of the electrical power to the motor based on a drop amount of a voltage of the secondary battery.
摘要:
A power tool includes: a battery cell group including a plurality of secondary battery cells; a motor to which an electric power is supplied from the battery cell group through a switching element and a trigger switch; a current detector detecting a current value flowing in a current path; and a controller configured to receive a detection signal from the current detector and controls on/off operation of the switching element. If the current detector detects that the current value flowing in the battery cell group continuously exceeds a given value for a first time period, the controller conducts one of alarm display and alarm control for allowing an operator to recognize that a high load operation continues. If the current value continuously exceeds the given value for a second time period longer than the first time period, the controller turns off the switching element to interrupt the current path.
摘要:
When a battery pack having an output voltage of 14.4 V that is connectable to an electric tool in a sliding manner is used as a power supply source for the electric tool that is connectable to a battery pack in an insertion manner and has a rated voltage of 12 V, the electric tool and the battery pack are connected to each other with an adaptor interposed therebetween. The adaptor has an FET that is switched at a predetermined duty of a predetermined frequency. The battery pack and the electric tool are connected or disconnected to or from each other by the switching operation, thereby dropping the output voltage of the battery pack. The voltage from the battery pack is detected. When the detected voltage is out of a predetermined value range, it is judged that the overcurrent or overdischarge has occurred. Then, the FET is turned off to stop the electric tool.
摘要:
When a battery pack having an output voltage of 14.4 V that is connectable to an electric tool in a sliding manner is used as a power supply source for the electric tool that is connectable to a battery pack in an insertion manner and has a rated voltage of 12 V, the electric tool and the battery pack are connected to each other with an adaptor interposed therebetween. The adaptor has an FET that is switched at a predetermined duty of a predetermined frequency. The battery pack and the electric tool are connected or disconnected to or from each other by the switching operation, thereby dropping the output voltage of the battery pack. When the detected voltage is out of a predetermined value range, it is judged that the overcurrent or overdischarge has occurred. Then, the FET is turned off to stop the electric tool.