Abstract: Disclosed is a camera module, the camera module comprises a bottom base (400), a shell body matched with the bottom base (400), hollowed and is provided with an opening at a top surface thereof, and a lens component (100) and a carrier (300) received in the shell body (200). The camera module further comprises two groups of moving members (600) arranged between an outer wall of the carrier (300) and the shell body (200), the lens component (100) is received in the carrier (300) and moves with respect to the bottom base (400) through the at least two groups of moving members (600). The camera module has prominent advantages including a simple inner structure, being easy to be carried, a quick response of focusing, a stable focusing performance, and an excellent imaging effect.

Abstract: A method for checking an out-of-step of a synchronous motor includes detecting three-phase currents of the synchronous motor; determining whether a relationship between the three-phase currents satisfies a preset requirement; and if no, determining that the synchronous motor is out of step. It is determined that the synchronous motor is out of step when amplitudes of each current of the three-phase currents are not equal or when the phase difference between the three-phase currents is not 120°.

Abstract: A method for checking an out-of-step of a synchronous motor includes detecting electric degrees of the synchronous motor, in which the electric degrees comprise at least a first electric degree and a second electric degree detected at a preset interval, and the second electric degree is detected after the first electric degree; comparing the first electric degree with the second electric degree to obtain a comparing result; and determining that the synchronous motor is out of step when the comparing result satisfies a preset requirement. It is determined that the synchronous motor is out of step when the electric degree keeps unchanged or decreases progressively, or an increment of the electric degree is very small.

Abstract: A power system for an electric vehicle, an electric vehicle and a motor controller for an electric vehicle are provided. The power system includes: a power battery (10); a charge-discharge socket (20); a three-level bidirectional DC-AC module (30); a motor control switch (40); a charge-discharge control module (50) having a first terminal connected with an AC terminal of the three-level bidirectional DC-AC module (30) and a second terminal connected with the charge-discharge socket (20); and a control module (60) connected with a third terminal of the charge-discharge control module (50) and a third terminal of the motor control switch (40), and configured to control the charge-discharge control module (50) and the motor control switch (40) according to a current working mode of the power system.

Abstract: A charging system for an electric vehicle and an electric vehicle are provided. The charging system comprises: a power battery; a charge-discharge socket; a bidirectional DC/DC module having a first DC terminal connected with a first terminal of the power battery and a second DC terminal connected with a second terminal of the power battery; a bidirectional DC/AC module having a first DC terminal connected with the second terminal of the power battery and a second DC terminal connected with the first terminal of the power battery; a charge-discharge control module having a first terminal connected with the AC terminal of the bidirectional DC/AC module and a second terminal connected with the charge-discharge socket; and a controller module connected with the charge-discharge control module, and configured to control the charge-discharge control module according to a current operation mode of the charging system.

Abstract: A power system for an electric vehicle, an electric vehicle and a motor controller for an electric vehicle are provided. The power system includes: a power battery (10); a charge-discharge socket (20); a three-level bidirectional DC-AC module (30); a motor control switch (40); a charge-discharge control module (50) having a first terminal connected with an AC terminal of the three-level bidirectional DC-AC module (30) and a second terminal connected with the charge-discharge socket (20); and a control module (60) connected with a third terminal of the charge-discharge control module (50) and a third terminal of the motor control switch (40), and configured to control the charge-discharge control module (50) and the motor control switch (40) according to a current working mode of the power system.

Abstract: An electric vehicle and a power system and a motor controller for an electric vehicle are provided. The power system includes a power battery; a charging-discharging socket; a bidirectional DC/DC module connected with the power battery; a driving control switch connected with the power battery and the bidirectional DC/DC module; a bidirectional DC/AC module connected with the driving control switch and the power battery; a motor control switch connected with the bidirectional DC/AC module and a motor; a charging-discharging control module connected with the bidirectional DC/AC module and the charging-discharging socket; and a controller module connected with and configured to control the driving control switch, the motor control switch and the charging-discharging control module according to a current operation mode of the power system.

Abstract: A method for controlling a rotation rate of an electric motor includes the s following steps: determining if an absolute value of a difference between an objective rotation rate of the electric motor and an actual rotation rate of the electric motor is greater than or equal to a predetermined value, and if yes, compensating a q axis current of the electric motor to adjust the rotation rate.

Abstract: A charging system for an electric vehicle and an electric vehicle including the same are provided. The charging system includes: a power battery; a first charging interface and a second charging interface connected with an external power source respectively; a first charging control branch connected between the power battery and the first charging interface, and a second charging control branch connected between the power battery and the second charging interface; and a controller connected with the first charging interface and the second charging interface respectively.

Abstract: An electric vehicle and a power system and a motor controller for an electric vehicle are provided. The power system includes a power battery; a charging-discharging socket; a bidirectional DC/DC module connected with the power battery; a driving control switch connected with the power battery and the bidirectional DC/DC module; a bidirectional DC/AC module connected with the driving control switch and the power battery; a motor control switch connected with the bidirectional DC/AC module and a motor; a charging-discharging control module connected with the bidirectional DC/AC module and the charging-discharging socket; and a controller module connected with and configured to control the driving control switch, the motor control switch and the charging-discharging control module according to a current operation mode of the power system.

Abstract: A charging system for an electric vehicle and an electric vehicle are provided. The charging system comprises: a power battery; a charge-discharge socket; a bidirectional DC/DC module having a first DC terminal connected with a first terminal of the power battery and a second DC terminal connected with a second terminal of the power battery; a bidirectional DC/AC module having a first DC terminal connected with the second terminal of the power battery and a second DC terminal connected with the first terminal of the power battery; a charge-discharge control module having a first terminal connected with the AC terminal of the bidirectional DC/AC module and a second terminal connected with the charge-discharge socket; and a controller module connected with the charge-discharge control module, and configured to control the charge-discharge control module according to a current operation mode of the charging system.

Abstract: A method for checking an out-of-step of a synchronous motor includes detecting electric degrees of the synchronous motor, in which the electric degrees comprise at least a first electric degree and a second electric degree detected at a preset interval, and the second electric degree is detected after the first electric degree; comparing the first electric degree with the second electric degree to obtain a comparing result; and determining that the synchronous motor is out of step when the comparing result satisfies a preset requirement. It is determined that the synchronous motor is out of step when the electric degree keeps unchanged or decreases progressively, or an increment of the electric degree is very small.

Abstract: A method for checking an out-of-step of a synchronous motor includes detecting three-phase currents of the synchronous motor; determining whether a relationship between the three-phase currents satisfies a preset requirement; and if no, determining that the synchronous motor is out of step. It is determined that the synchronous motor is out of step when amplitudes of each current of the three-phase currents are not equal or when the phase difference between the three-phase currents is not 120°.

Abstract: A method for controlling a rotation rate of an electric motor includes the s following steps: determining if an absolute value of a difference between an objective rotation rate of the electric motor and an actual rotation rate of the electric motor is greater than or equal to a predetermined value, and if yes, compensating a q axis current of the electric motor to adjust the rotation rate.

Abstract: An open phase detection system and method for a three-phase motor is provided. The open phase detection system comprises: a signal generating unit coupled to the three-phase motor and configured to generate a driving signal for driving the three-phase motor; a detecting unit coupled to the signal generating unit, and configured to detect whether the signal generating unit generates the driving signal and to detect three-phase current values of the three-phase motor; and a determining unit coupled to the detecting unit, and configured to determine whether the three-phase motor has open phase according to the three phase current values detected by the detecting unit when the driving signal is detected.

Abstract: An open phase detection system and method for a three-phase motor is provided. The open phase detection system comprises: a signal generating unit coupled to the three-phase motor and configured to generate a driving signal for driving the three-phase motor; a detecting unit coupled to the signal generating unit, and configured to detect whether the signal generating unit generates the driving signal and to detect three-phase current values of the three-phase motor; and a determining unit coupled to the detecting unit, and configured to determine whether the three-phase motor has open phase according to the three phase current values detected by the detecting unit when the driving signal is detected.

Abstract: A motor overload protecting method includes (a) detecting an instantaneous motor current value in real-time, calculating a current integral value in each of a corresponding integral period, and resetting the current integral value to 0 at an end of the integral period, (b) obtaining an overload coefficient according to the current integral value, which is greater than or equal to 0 and less than 1 when the current integral value is greater than or equal to a maximum motor current value, and is equal to 1 when the current integral value is less than the maximum motor current value, wherein the maximum motor current value is a maximum current integral value when the motor is in a non-overload condition; and (c) multiplying the instantaneous motor current value by the overload coefficient to obtain a new input current value, and operating the motor according to the new input current value.

Abstract: A motor overload protecting method includes (a) detecting an instantaneous motor current value in real-time, calculating a current integral value in each of a corresponding integral period, and resetting the current integral value to 0 at an end of the integral period, (b) obtaining an overload coefficient according to the current integral value, which is greater than or equal to 0 and less than 1 when the current integral value is greater than or equal to a maximum motor current value, and is equal to 1 when the current integral value is less than the maximum motor current value, wherein the maximum motor current value is a maximum current integral value when the motor is in a non-overload condition; and (c) multiplying the instantaneous motor current value by the overload coefficient to obtain a new input current value, and operating the motor according to the new input current value.