ABB L003748-AR 3BSX108237R300 Industrial control module/component Input/output module
Brand ABB Color Standard Application Industrial height 335mm rated current 560mA
Protection Level IP45 Suitable for motor power 116KW Application Site Power Industry Material Code GJR2391500R1220 Power industry HIEE401782R0001 Part Number L003748-AR 3BSX108237R300
Applicable pipe 2 Whether imported is weighing 5.18 kg can be sold nationwide
ABB L003748-AR 3BSX108237R300 Industrial control module/component Input/output module
Based on the principle of electromagnetic induction rotating transformer (Resolver), sometimes known as the resolver, is a precision control motor, in the electric power steering system, to complete the detection of axial displacement information. Because it is an analog electromechanical component, when it is used in a digital system, it needs a certain interface circuit, that is, a rotary transformer-digital converter (RDC), to achieve the conversion of analog signals to the digital quantities of the control system. The rotary transformer and AD2S83 can form a high-precision electric power Angle position detection system, and the analog speed signal output by AD2S83 can also be used as a speed feedback signal to form a speed loop in the electric power steering system.
2 Rotary transformer
resolver is a kind of electromagnetic sensor, also known as synchronous resolver. It is a small AC motor for measuring Angle, which is used to measure the angular displacement and angular speed of the rotating object. It is composed of a stator and a rotor. The stator winding, as the primary side of the transformer, receives the excitation voltage, and the excitation frequency is usually 400, 3000 and 5000HZ. As the secondary side of the transformer, the rotor winding obtains the induced voltage through electromagnetic coupling. The working principle of the rotary transformer is basically similar to that of the ordinary transformer, the difference is that the primary and secondary windings of the ordinary transformer are relatively fixed, so the ratio of output voltage to input voltage is constant, while the primary and secondary windings of the rotary transformer change relative positions with the angular displacement of the rotor, so the output voltage changes with the angular displacement of the rotor. The voltage amplitude of the output winding has a sine or cosine function relationship with the rotor Angle, or maintains a proportional relationship, or has a linear relationship with the rotor Angle within a certain Angle range. If the exciting voltage of the rotating transformer is E=Esinwt, then the electromotive force induced in the orthogonal A and B two-phase winding is:
The rotating transformer generally has two kinds of structure forms: bipolar winding and quadrupole winding. The stator and rotor of the rotating transformer have a pair of magnetic poles, and the quadrupole winding has two pairs of magnetic poles, which are mainly used for high-precision detection systems. In addition, there are multipole rotary transformers for high-precision absolute inspection systems.
3 Introduction to AD2S83
The AD2S83 is a single chip integrated circuit manufactured by BiMOS II process, which combines advanced CMOS logic circuit with high-precision bipolar linear circuit. It has low power consumption (300mW), its digital output resolution can be set by the user to 10,12,14 or 16 bits, and has a speed output signal for the user to use as a speed feedback signal of the speed loop to replace the speed measurement components such as the tachygenerator, thus reducing the size of the system. When the AD2S83 is connected according to Figure 1, it forms a tracking RDC operating on the Type II servo ring, and its digital output can automatically track the axis Angle input at the selected maximum tracking rate without static error. Because it uses the ratio tracking method when converting the rotary transformer signal to binary, the output digital Angle is only related to the ratio of SIN and COS input signals, and has nothing to do with their absolute value. Therefore, the AD2S83 is not sensitive to the amplitude and frequency changes of the input signal, and it is not necessary to use a stable and accurate oscillator to generate a reference signal. And still be accurate. The presence of a phase-sensitive detector in the conversion loop ensures a high ability to suppress the orthogonal components in the reference signal. In addition, it has a strong ability to suppress noise and harmonics. The outstanding advantage of the AD2S83 is that it can be selected by the user to optimize the performance of the entire system.
ABB L003748-AR 3BSX108237R300 Industrial control module/component Input/output module
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