Systems and methods for energy storage and management may be useful for a variety of applications, including launch devices. A system can include a direct current (DC) bus configured to operate within a predetermined range of voltages. The system can also include an array comprising a plurality of ultra-capacitors connected to the DC bus and configured to supply the DC bus with energy. The system can further include an input configured to receive energy from a power grid, wherein the power grid is configured to supply fewer than 250 amps of power. The system can additionally include an output configured to supply more than 250 amps of power. The system can also include a controller configured to control charging and discharging of the array of ultracapacitors and configured to control the DC bus to remain within the predetermined range of voltages.

Systems and methods for energy storage and management may be useful for a variety of applications, including launch devices. A system can include a direct current (DC) bus configured to operate within a predetermined range of voltages. The system can also include an array comprising a plurality of ultra-capacitors connected to the DC bus and configured to supply the DC bus with energy. The system can further include an input configured to receive energy from a power grid, wherein the power grid is configured to supply fewer than 250 amps of power. The system can additionally include an output configured to supply more than 250 amps of power. The system can also include a controller configured to control charging and discharging of the array of ultracapacitors and configured to control the DC bus to remain within the predetermined range of voltages.

A system and method for integrated charging a vehicle includes a hybrid excitation machine, operable as a traction motor and including a rotor separated by an air gap from a stator with AC windings. An AC utility line power supply is connected to the AC windings providing an electrical current to the vehicle and inducing a magnetic flux across the air gap and in the rotor. A short circuit, an open circuit, or a DC voltage may be applied to a DC winding in the stator to reduce the magnetic flux into the rotor. A field coil in the rotor may be excited with a DC voltage using a secondary coil on the rotor in a traction mode. The secondary coil is excited by the stator windings using field-oriented control in a “self-excited machine” embodiment, and is directly excited by a separate primary coil in an “externally-excited machine” embodiment.

A signal transmission device includes a signal transmission chip, and a first lead frame supporting the signal transmission chip. A first inductor spiral ring is on a surface of the signal transmission chip, a second inductor spiral ring is inside the signal transmission chip, a first bonding pad is electrically coupled between the first and second inductor spiral rings, a guard ring covers the first and second inductor spiral rings in a plan view, and bonding pads are outside of the guard ring. A direction of rotation between the first and second inductor spiral rings are different from each other. The signal transmission device further includes a semiconductor chip and a second lead frame supporting the semiconductor chip, wherein the signal transmission chip and the semiconductor chip face each other.

A signal transmission device includes a signal transmission chip, and a first lead frame supporting the signal transmission chip. A first inductor spiral ring is on a surface of the signal transmission chip, a second inductor spiral ring is inside the signal transmission chip, a first bonding pad is electrically coupled between the first and second inductor spiral rings, a guard ring covers the first and second inductor spiral rings in a plan view, and bonding pads are outside of the guard ring. A direction of rotation between the first and second inductor spiral rings are different from each other. The signal transmission device further includes a semiconductor chip and a second lead frame supporting the semiconductor chip, wherein the signal transmission chip and the semiconductor chip face each other.

A power conversion unit may include two or more power modules for providing high-voltage direct current power to electrical loads, such as one or more propulsion motors aboard an aerial vehicle. Each of the power modules may be controlled by hysteresis, and may include one or more pairs of transistors that are switched by a gate driver with respect to differences between a reference current and a sensed current passing through a boost inductor. The number, size and shape of the power modules may be selected to accommodate the electrical loads, and may be switched on or off, as necessary. The power conversion unit may feature at least one more power module than is required to meet all anticipated electrical loads, thereby ensuring that the power conversion unit may continue to provide power even in the event that one of the power modules experiences a fault of any kind.

A power conversion unit may include two or more power modules for providing high-voltage direct current power to electrical loads, such as one or more propulsion motors aboard an aerial vehicle. Each of the power modules may be controlled by hysteresis, and may include one or more pairs of transistors that are switched by a gate driver with respect to differences between a reference current and a sensed current passing through a boost inductor. The number, size and shape of the power modules may be selected to accommodate the electrical loads, and may be switched on or off, as necessary. The power conversion unit may feature at least one more power module than is required to meet all anticipated electrical loads, thereby ensuring that the power conversion unit may continue to provide power even in the event that one of the power modules experiences a fault of any kind.

A theft deterring system includes a power tool with a motor connectable to a power source, a switch connected to the motor, a controller controlling to the switch for controlling an amount of power provided to the motor, and a state circuit having a memory for storing a state value. The controller activates the switch to provide power to the motor when the state value stored in the memory equals a desired value. The system may also include a tag programmer for changing the stored value.

In the case of this brake control device, for example, a drive control unit is capable of executing, in a switching manner, drive control of a motor based on an operation amount and drive control of the motor based on a stored value in a storage unit. The drive control unit continues the drive control of the motor based on the operation amount until the operation amount reaches a state satisfying a predetermined convergence condition while the drive control of the motor based on the operation amount is being executed. The storage unit stores a parameter value, which is obtained in the state in which the operation amount satisfies the predetermined convergence condition, into the storage unit as the stored value.

In the case of this brake control device, for example, a drive control unit is capable of executing, in a switching manner, drive control of a motor based on an operation amount and drive control of the motor based on a stored value in a storage unit. The drive control unit continues the drive control of the motor based on the operation amount until the operation amount reaches a state satisfying a predetermined convergence condition while the drive control of the motor based on the operation amount is being executed. The storage unit stores a parameter value, which is obtained in the state in which the operation amount satisfies the predetermined convergence condition, into the storage unit as the stored value.